
Low Thyroid Explained – Causes, Symptoms, and Treatment of Hypothyroidism
Introduction: Understanding “Low Thyroid”
Have you been feeling unusually tired, chilly, or just not quite yourself? It might not just be stress or aging – it could be your thyroid. The term “low thyroid” refers to hypothyroidism, a condition where the thyroid gland is underactive and doesn’t produce enough thyroid hormone. The thyroid, a small butterfly-shaped gland in your neck, is like the body’s engine control – it releases hormones (primarily T4 and T3) that regulate your metabolism, energy production, and even influence mood and body temperature. When those hormone levels drop, your body processes slow down.
Low thyroid is a very common condition. In fact, about 20 million Americans have some form of thyroid disease, and hypothyroidism is the most common type. Women are particularly at risk – they are five to eight times more likely than men to develop low thyroid issues. To put it in perspective, one in eight women will develop a thyroid disorder in her lifetime. That’s a significant number, which means if it’s not you, it’s likely someone you know. Here in West Virginia, we see many cases of low thyroid. Some local health professionals recall that our region, like much of Appalachia, was part of the historic “goiter belt” before iodine was added to table salt – meaning thyroid problems from iodine deficiency were once common. Today, iodine deficiency isn’t as prevalent in the U.S., but hypothyroidism still affects a lot of people, often due to other causes we’ll discuss.
This article will explain in plain language what causes a low thyroid, how to recognize the signs, how it’s diagnosed and treated, and what you can do – both medically and through lifestyle – to manage it. By the end, you should have a clear understanding of hypothyroidism and feel empowered to seek the right help. Whether you’re from Hurricane, WV or anywhere else, the goal is to demystify low thyroid and point you toward feeling better.
What Causes a Low Thyroid?
There are several reasons why someone’s thyroid might not produce enough hormones. Let’s break down the most common causes:
1. Hashimoto’s Thyroiditis (Autoimmune Hypothyroidism): This is by far the leading cause of hypothyroidism in the United States and other countries where iodine intake is sufficient. Hashimoto’s is an autoimmune condition – essentially, your immune system mistakenly attacks your thyroid gland as if it were an invader. Over time, this attack damages the thyroid’s ability to make hormones. It tends to run in families and is more common in women and middle age. If you have other autoimmune conditions (like type 1 diabetes or celiac disease), your risk for Hashimoto’s is higher. In Hashimoto’s, the onset can be slow; your thyroid might sputter out gradually, which is why symptoms might creep up over years. Blood tests for thyroid antibodies (TPO and Tg antibodies) can help confirm this cause. The majority of hypothyroid cases in our area are due to Hashimoto’s, even if people don’t always know that name – they just know they “have a low thyroid” and take medication for it.
2. Iodine Deficiency: Iodine is a mineral essential for making thyroid hormones (in fact, T4 and T3 hormones each contain iodine atoms). If you don’t get enough iodine, your thyroid can’t produce sufficient hormone. Worldwide, iodine deficiency is the most common cause of hypothyroidism and goiter (an enlarged thyroid). In the U.S., iodine deficiency is less common since many foods are fortified (iodized salt, dairy, bread) and we have access to iodine-rich foods (seafood, seaweed). However, certain groups might still be at risk: people who avoid iodized salt for health reasons, those on specialized diets, or pregnant women (who have higher iodine needs). West Virginia does not have a coastline, so historically, diets were more iodine-poor until fortification became standard. While outright iodine deficiency is not prevalent now, some individuals may have marginal iodine intake. That said, too much iodine (from excessive supplements or medications like amiodarone) can also cause thyroid problems, so balance is key.
3. Thyroid Surgery or Treatment: If someone has had thyroid surgery (for instance, removal of thyroid nodules, goiter, or thyroid cancer) and a significant portion of the gland is removed, they will likely become hypothyroid. Similarly, radioactive iodine treatment (often used for hyperthyroidism or thyroid cancer) will intentionally destroy thyroid tissue and lead to low thyroid function afterward. In our community, there are patients who became hypothyroid as a planned outcome of treating Graves’ disease (the opposite condition, where thyroid was overactive) or due to surgery.
4. Radiation to the Neck: Treatment for other cancers (like Hodgkin’s lymphoma or head and neck cancers) may involve radiation that inadvertently damages the thyroid. Years after such treatment, hypothyroidism can develop.
5. Medications: Some medications can induce hypothyroidism. A notable one is lithium (used in psychiatric treatment), which can affect thyroid hormone release. Another is the heart medication amiodarone (which contains a lot of iodine). These are special cases, but if you’re on these medications, your doctor usually monitors your thyroid function.
6. Congenital Hypothyroidism: Some babies are born with an underdeveloped or missing thyroid gland (this is rare, about 1 in 3-4,000 newborns). In West Virginia and everywhere in the U.S., newborns are screened at birth for congenital hypothyroidism because, if untreated, it can lead to serious developmental issues. Fortunately, if caught early, it’s easily treated with thyroid hormone and the children develop normally.
7. Secondary (Central) Hypothyroidism: Much less common, this is when the thyroid itself is fine, but the pituitary gland (the master gland in the brain) isn’t stimulating it properly. The pituitary makes TSH (thyroid stimulating hormone) which tells the thyroid to work. Pituitary disorders or tumors can lead to low TSH, and thus a sluggish thyroid. But this is quite uncommon compared to primary hypothyroidism (which is at the thyroid level).
In summary, for most adults especially in our region, the likely cause of low thyroid will be Hashimoto’s autoimmune thyroiditis. It can be reassuring to know that you didn’t do anything wrong to cause this – there’s often a genetic predisposition combined with possibly some environmental triggers. Sometimes patients ask if things like stress or pregnancy can “trigger” a thyroid problem; indeed, we often see hypothyroidism diagnosed in women postpartum or during times of high stress. These life events didn’t cause it out of nowhere, but they may have revealed the thyroid weakness (autoimmune attacks can flare in those situations).
Knowing the cause is helpful (for example, if it’s Hashimoto’s, you know it’s likely permanent and you may have other autoimmune tendencies to watch for), but regardless of cause, the approach to treatment (replacing the missing hormone) is similar, which we’ll get to after covering symptoms.
Symptoms and Signs of Low Thyroid

How can you tell if you might have a low thyroid? Hypothyroidism often develops slowly, so symptoms can be subtle at first. People sometimes attribute them to getting older or having a busy life. Here are the common symptoms and signs of an underactive thyroid:
Fatigue and Weakness: Feeling tired all the time is a hallmark. This isn’t just normal tiredness from a long day – it’s an oppressive fatigue that makes it hard to get through daily tasks. You might feel like you need naps or more sleep than usual, yet even with rest, you remain exhausted.
Weight Gain or Difficulty Losing Weight: Because thyroid hormones help regulate metabolism, low levels can lead to weight gain, often accompanied by puffiness (water retention). You might notice your clothes fitting tighter even if your diet hasn’t changed much. Conversely, losing weight becomes a major uphill battle until the thyroid issue is treated.
Cold Intolerance: Do you reach for a sweater when everyone else is fine? People with low thyroid often feel chilly in normal environments. Cold hands and feet, or just a general intolerance to cold temperatures, are frequent complaints.
Dry Skin and Brittle Hair/Nails: Thyroid hormone is like the oil in the engine for many bodily functions. Without enough, skin may become dry or scaly, nails can become brittle or grow slowly, and hair might turn dry/coarse and even fall out more than usual. Some women notice thinning of the outer third of their eyebrows – a classic but less common sign.
Mood Changes and Cognitive Effects: Low thyroid can significantly affect mood and mental function. Depression is strongly associated with hypothyroidism. Even if not full depression, you might feel blue, apathetic, or have a sense of mental fog. Memory and concentration can slip – patients describe it as “brain fog” or feeling a bit detached or forgetful.
Slow Heart Rate and Low Blood Pressure: The body’s processes slow down, and that includes heart rate. Some people with hypothyroidism have a pulse on the lower side (in the 50s or low 60s beats per minute). They may also feel their heart isn’t pumping as strongly. Blood pressure might drop (though weight gain from hypothyroid can increase blood pressure, so this varies).
Muscle Aches and Joint Stiffness: Another symptom can be muscle cramps or aches and joint pain or stiffness. The muscles might feel weak, particularly in the shoulders and thighs, making it harder to climb stairs or lift things.
Constipation: Digestion can slow, leading to constipation or less frequent bowel movements. This paired with a slower metabolism can make one feel bloated.
Menstrual and Fertility Issues: Women may have heavier or more prolonged menstrual periods (menorrhagia), or cycles might become irregular. Low thyroid can also affect ovulation, making it harder to conceive. During pregnancy, untreated hypothyroidism can pose risks like miscarriage or developmental problems for the baby, which is why obstetricians routinely check thyroid function in expectant mothers.
High Cholesterol: Not something you feel, but on lab tests hypothyroidism often causes elevated cholesterol levels (because metabolism of fats is slower). So sometimes a clue is a lab result: if your cholesterol is high despite a good diet, your doctor might check your thyroid.
It’s important to note that not everyone will have all these symptoms. Some may have just a couple that are pronounced. For example, one person might primarily experience fatigue, depression, and weight gain; another might really notice the cold intolerance and dry skin. Severity matters too – if your thyroid is only slightly underactive, symptoms could be mild, whereas a very low thyroid (like TSH extremely high) can cause more obvious signs.
In our clinic, we had a patient from Hurricane, a gentleman in his early 60s, who came in mainly because he felt extremely tired and had gained 20 pounds in a year without a clear reason. He also mentioned he had to buy thicker socks for winter because his feet were always freezing. Sure enough, his lab work showed a low thyroid. In hindsight, he also realized he’d been struggling with some mild depression and just “slowing down” over the past year, which he attributed to getting older, but it was largely his thyroid.
One challenge: these symptoms are not exclusive to hypothyroidism. Fatigue and weight gain could be due to other issues too, which is why we confirm with lab tests. Speaking of which:
How Low Thyroid is Diagnosed

Diagnosing hypothyroidism is straightforward with the right blood tests. If you or your doctor suspect a low thyroid based on symptoms, the first test usually ordered is TSH (Thyroid Stimulating Hormone). TSH is produced by the pituitary gland and acts as the thyroid’s overseer – if thyroid hormone levels in the blood are low, the pituitary cranks up TSH to tell the thyroid “work harder!” In primary hypothyroidism, your thyroid is sluggish, so the pituitary yells louder and louder (high TSH) trying to compensate. Thus, a high TSH level indicates hypothyroidism (with a few exceptions like the rare pituitary issue). Typically, a normal TSH is around ~0.4 to 4.0 mIU/L (exact range varies by lab). If your TSH is above the normal range, that suggests your thyroid hormone levels are low.
The doctor will often also check Free T4 (thyroxine) levels, since T4 is the main hormone the thyroid produces. In overt hypothyroidism, T4 will be below normal while TSH is above normal. There’s also something called subclinical hypothyroidism where TSH is mildly elevated but T4 is still in range; this can be an early stage of thyroid decline or due to other factors – whether to treat subclinical cases depends on how high TSH is and if you have symptoms.
Sometimes T3 (triiodothyronine) is checked, although in early or mild hypothyroid, T3 often remains normal longer as the body tries to compensate by converting more T4 to T3. But if T3 is low too, it can reinforce the diagnosis.
If Hashimoto’s is suspected, doctors may check thyroid antibodies: anti-TPO and anti-thyroglobulin antibodies. A high level of these confirms that an autoimmune process is present. However, testing antibodies isn’t always necessary for diagnosis or treatment – many primary care docs will diagnose based on TSH/T4 levels and start treatment, since the presence of antibodies doesn’t change the treatment (which is still to replace hormone). But it can be personally validating for patients to know the cause (like “Yes, you have Hashimoto’s, that’s why this happened”). Our clinic often does test for them, especially in borderline cases or in those who want a deeper understanding of their condition.
As mentioned earlier, screening is common for certain groups. Pregnant women get their thyroid levels checked because even mild hypothyroidism in pregnancy can affect the baby’s brain development and increase risk of complications. Newborns are screened at birth as well. If you have a family history of thyroid disease, your provider might screen you periodically.
One thing to highlight: hypothyroidism is often underdiagnosed because symptoms can be vague. The ATA notes that up to 60% of people with thyroid disease don’t know they have it. You might have “normal” labs one year and then the next year show hypothyroid, or you might hover in a gray zone. So, if you feel symptomatic but initial tests are normal, a good doctor will sometimes recheck after a few months, or do more detailed testing. We’ve seen local patients who felt unwell for years until someone finally ran a thyroid panel and connected the dots.
In summary, the TSH test is the cornerstone. If you remember one thing: high TSH typically = low thyroid function. And fortunately, it’s a simple blood test available at any lab. Many walk-in labs or health fairs do thyroid screenings these days, but it’s best to have results interpreted by a healthcare professional who can see the full picture (for instance, “Is the TSH high enough that we definitely treat, or is it borderline, in which case we weigh options?”).
Treatment: Getting Your Thyroid Levels Back to Normal

Treating hypothyroidism is usually very effective – most people start to feel much better once their hormone levels are restored to normal. The standard treatment is to replace the missing hormone. This is typically done with a daily thyroid hormone pill. The most commonly prescribed medication is levothyroxine, a synthetic form of T4 (brand names include Synthroid, Levoxyl, etc.). This medication essentially does what your thyroid would do if it could – provide T4, which your body then converts into active T3 as needed.
Levothyroxine is tailored to your dose; not everyone needs the same amount. It might take a little trial and error at first to find the perfect dose that normalizes your TSH and alleviates symptoms. Doctors usually start with an estimated dose based on your weight and the severity of your TSH elevation, then recheck labs in about 6-8 weeks (because it takes that long for TSH to fully respond). They adjust from there. Once stable, you might check levels every 6-12 months.
It’s important to take thyroid medication correctly: usually first thing in the morning on an empty stomach with water, and then wait about 30-60 minutes before eating or drinking anything else. This helps ensure proper absorption. Also, you should avoid taking calcium or iron supplements at the same time (give a 4-hour gap) because they can bind the medication in the gut and reduce absorption. (So, if you take a multivitamin with iron, do it at lunch or dinner, not with your morning thyroid pill.)
For those who prefer “natural” options, there is desiccated thyroid (like Armour Thyroid or Nature-Throid), which is made from pig thyroid glands and contains both T4 and T3. Some patients feel better on these, possibly due to the T3 content. However, their potency can be less consistent tablet to tablet, and many conventional doctors stick to levothyroxine which is very consistent and only provides T4. In our practice, we’re open to patient preferences – if someone really wants to try Armour Thyroid and they are closely monitored, it can be an option. But levothyroxine remains the gold standard.
A small subset of patients don’t feel optimal on T4 only; they might benefit from adding a bit of T3 (liothyronine) to their regimen. This is something an endocrinologist or knowledgeable thyroid practitioner might do if a patient’s T3 is low or they have persistent symptoms despite normal TSH on T4. It’s somewhat controversial in the endocrine community, but personalized medicine sometimes calls for it.
Once on the correct dose of medication, symptoms should greatly improve or resolve. You’ll have more energy, your skin and hair should recover, and weight gain often stabilizes (though losing weight might still require diet and exercise – the medicine is not a weight-loss drug, it just removes the metabolic roadblock so you’re on equal footing again). Mentally, people often say it’s like a fog lifts. It’s really rewarding to see someone come back for a follow-up after starting treatment and report “I feel like a human again!”
An important thing to convey: hypothyroidism is usually a lifelong condition, especially if caused by Hashimoto’s. The thyroid doesn’t typically “wake back up” once it has been damaged. So, expect to be on medication long-term. But it’s a relatively easy long-term treatment, akin to taking a vitamin each day. The dose may need adjustment over the years (for example, some people’s needs increase slowly with age, or change with weight changes, or for women, during pregnancy the dose often needs to go up by ~30-50%). Regular check-ins make sure you’re always in the right zone.
Are there any other treatments? If a goiter (enlarged thyroid) is present, treating with medication often shrinks it somewhat. Only rarely, if the goiter is big and causing compression symptoms, might surgery be considered. But for typical hypothyroidism without a huge goiter, surgery is not indicated – we treat it medically.
Lifestyle support is a great add-on. While medication does the heavy lifting, addressing lifestyle can help you feel your best:
Diet: Ensure you’re getting adequate iodine but not excessive. Using iodized salt in moderation covers most people. Foods like fish, dairy, and eggs have iodine. Selenium-rich foods (like Brazil nuts, tuna, mushrooms) might support thyroid health since selenium is needed for converting T4 to T3. Eating a balanced diet can also help manage weight and energy. Some individuals with Hashimoto’s find that avoiding gluten or certain other foods improves their antibodies or well-being, though this is individual and scientific evidence is not conclusive on a broad scale. Still, if someone wants to try dietary changes, it can be done safely with guidance.
Exercise: When your energy returns with treatment, gradually getting into regular exercise will further boost energy and help with any weight issues. Before treatment, exercise might have felt impossible; after, you’ll likely find you can be active again. Since hypothyroidism can contribute to high cholesterol and sluggish circulation, exercise is an antidote to those as well.
Stress Management: Chronic stress can affect your hypothalamus and pituitary, potentially influencing thyroid function. Moreover, high cortisol (stress hormone) can worsen the impact of hypothyroid symptoms (like fatigue and weight gain). Practices like yoga, meditation, or even simple hobbies and relaxation can be beneficial. Think of it as easing the load on your body, which is already struggling with a slow metabolism – stress is another weight on that system.
Sleep: Getting enough quality sleep is vital. Hypothyroid folks might sleep a lot and still feel tired, but as treatment kicks in, optimize your sleep habits to ensure you’re truly rested.
Local healthcare support: In Hurricane and the surrounding area, you have resources. There are primary care physicians who routinely manage hypothyroidism. For more complex cases, there are endocrinologists in Charleston or Huntington if needed (though one might not need a specialist unless things are not straightforward). At our wellness clinic, we take a comprehensive approach: we not only prescribe thyroid hormone if needed, but also monitor vitamins like B12, D, iron, etc., since these deficiencies can also cause fatigue and might co-occur with Hashimoto’s. For example, iron deficiency is common in women and can worsen fatigue and hair loss – we’d address that too. By treating the “whole person,” we aim for you to feel truly well, not just have normal lab numbers.
Don’t Ignore the Signs: When to Seek Help
If you suspect you have symptoms of low thyroid, it’s important to seek a medical evaluation. Don’t dismiss persistent fatigue, significant weight changes, or feeling abnormally cold as just getting older or “being busy.” As we’ve shown, these could be your body’s signals of an underlying issue that’s quite fixable.
Consider getting your thyroid checked if:
You have multiple symptoms described above (fatigue + weight + cold, for instance).
You have a family history of thyroid disorders.
You’ve had previous neck surgery or radiation.
You are a woman over 35 or recently had a baby and feel off; pregnancy and postpartum can trigger thyroid issues (there’s a condition called postpartum thyroiditis that can cause a swing of hyperthyroid then hypothyroid).
You have elevated cholesterol with no obvious dietary reason – doctors often check thyroid in that scenario.
You simply have that gut feeling something isn’t right with your body’s “speed.”
The evaluation is simple and could spare you years of feeling unwell. Left untreated, hypothyroidism can lead to some serious issues. It can raise your risk for heart problems because it can increase cholesterol and cause subtle heart function changes. It can contribute to infertility or pregnancy complications if you’re in that stage of life. In extreme cases (usually when undiagnosed for a long time, especially in the elderly), a life-threatening state called myxedema coma can occur, with very low body temperature, confusion, and slowed function of multiple organs. That’s fortunately very rare – basically, we never want anyone to get to that point, which is why we encourage treating even moderate hypothyroidism.
For residents in Hurricane, WV and surrounding areas, help is accessible. You can start with your primary care provider – they can order labs and often manage hypothyroidism well. If you don’t have a PCP or want a more holistic check-up, our clinic is here with open arms. We can evaluate your thyroid along with other aspects of health.
Living with Hypothyroidism: Outlook and Tips
The good news is that hypothyroidism is very manageable. Most people who get on the right treatment and dose feel 100% normal and essentially forget they have a thyroid issue (aside from taking their pill). It’s not like some conditions that constantly flare up or deteriorate – as long as you take your medication and check in occasionally, you can consider it under control.
However, living with hypothyroidism does teach you to listen to your body. You’ll become attuned to signs that your dose might need adjusting (e.g., if symptoms creep back or if you get symptoms of too much thyroid like jitteriness or feeling too warm, which could mean dose too high). Luckily, adjustments are easy with a quick blood test and dose tweak.
Here are some practical patient tips for thriving with a low thyroid:
Stay consistent with medication. Take it at the same time each day and don’t skip doses. If you do forget, some providers say you can take it later that day (on an empty stomach) or double the next day, but best to ask your doctor for their advice on missed doses.
Regular check-ups. Typically, once stable, check your TSH annually. But if you feel off between checks, don’t hesitate to get it checked sooner. Life changes like significant weight loss/gain or pregnancy definitely warrant rechecking and likely adjusting dose.
Communicate changes. If you start or stop other meds (like birth control, which can affect thyroid binding in blood, or even over-the-counter supplements), let your doctor know – a dose re-evaluation might be needed. For example, estrogen can increase the amount of thyroid hormone you need slightly.
Wear a medical ID? Not necessary for most, but if you have severe hypothyroidism or other conditions, some patients feel better having a note of it. In general, as long as family knows you have it and you take medicine, an ID isn’t usually needed.
Connect with others. Sometimes it’s nice to talk to fellow patients. There are local support groups (ask at a hospital or look on social media for a West Virginia thyroid group) and plenty of online forums. Just remember, everyone’s experience is personal – use those groups for support, but medical advice should come from professionals.
From a local perspective, addressing a low thyroid can be one piece of improving overall health in West Virginia. Our state has high rates of obesity and diabetes, and untreated hypothyroidism can exacerbate weight gain and cholesterol issues, potentially feeding into the risk of heart disease. By diagnosing and treating hypothyroidism, we remove one obstacle to maintaining a healthy weight and metabolism. It won’t instantly cure other issues, but patients often feel more capable of tackling diet and exercise once their thyroid is corrected because they finally have the energy to do so.
Conclusion
Low thyroid (hypothyroidism) is a common condition that can have a big impact on your quality of life – but it’s also one of the most treatable conditions out there. We hope this guide has explained hypothyroidism clearly: you’ve learned what causes it (from autoimmune factors like Hashimoto’s to nutritional aspects like iodine), recognized the classic symptoms (that persistent fatigue, weight gain, chilliness, and more), and seen how simple blood tests can confirm what’s going on. Most importantly, you’ve heard that with proper treatment – usually a daily hormone pill – people truly get back to feeling like themselves. Remember, as many as one in eight women will face this, and lots of men too, so if you’re experiencing these symptoms, you’re not alone and you’re not “crazy” for thinking something physical might be wrong.
If any of these signs rang a bell for you, consider this an invitation to take action for your health. Don’t just soldier on feeling miserable when a solution could be within reach. Start by contacting a healthcare provider for a thyroid evaluation. It could be your family doctor, an endocrinologist, or you can reach out to us at our Hormone & Wellness Clinic in Hurricane, WV. We have helped many folks in our community uncover and treat low thyroid, and we take a comprehensive approach to ensure you get balanced care.
Are you ready to get to the bottom of your unexplained fatigue or weight changes? Do you want the fog to lift and your vitality back? We are here to help. Contact us to schedule a thorough thyroid evaluation – we’ll listen to your symptoms, run the appropriate tests (often a quick blood draw is all it takes), and go over the results with you in detail. If your thyroid is indeed underactive, we’ll guide you through starting treatment and adjusting your lifestyle to feel better fast. Even if your thyroid turns out normal, we’ll help investigate other possible causes for how you’re feeling. The point is: you deserve to feel your best, and getting your thyroid checked is a great step in that direction.
Don’t let low thyroid symptoms keep dragging you down. With the right help, you can regain your energy, stabilize your weight, and brighten your mood. Reach out today – whether it’s to us or another trusted healthcare provider – and take that step. As we like to say, in these hills of West Virginia, no one should have to climb the mountain of fatigue alone. Let’s uncover what’s going on and get you on the path to better health!