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Medically reviewed by Oghenefejiro Okifo | MD, Harvard Medical School | Henry Ford Hospital - Detroit, MI on February 27th, 2024.
Key Takeaways
- The thyroid produces T3 and T4 hormones that regulate metabolism in every cell—TSH levels above 4.0 mIU/L indicate hypothyroidism while levels below 0.4 suggest hyperthyroidism.
- Hashimoto's thyroiditis affects 5% of the population and is the leading cause of underactive thyroid, while Graves' disease causes 70% of overactive cases, both being autoimmune conditions.
- Levothyroxine dosing starts at 1.6 mcg per kilogram of body weight daily for hormone replacement, taken on an empty stomach 30-60 minutes before breakfast for optimal absorption.
- Radioactive iodine therapy destroys overactive tissue within 3-6 months but often leads to permanent hypothyroidism requiring lifelong hormone replacement afterward.
- Untreated hypothyroidism can raise cholesterol by 20-50 mg/dL and increase heart disease risk, while severe hyperthyroidism may trigger life-threatening thyroid storm with heart rates exceeding 140 bpm.
Your thyroid gland, located at the front of your neck, plays a crucial role in regulating your body's metabolic processes through the hormones it produces. When your thyroid makes either too much or too little of these important hormones, it's called thyroid disease. Thyroid disorders can range from harmless goiters to life-threatening cancer, but most can be managed well with proper diagnosis and treatment.
Types of Thyroid Disease
There are two main types of thyroid disease:
Hyperthyroidism: An overproduction of thyroid hormones, which can be caused by Graves' disease, toxic adenomas, subacute thyroiditis, or rare conditions like pituitary gland malfunctions or cancerous growths in the thyroid gland.
Hypothyroidism: An underproduction of thyroid hormones, which can be caused by Hashimoto's thyroiditis, postpartum thyroiditis, iodine deficiency, thyroid removal, exposure to excessive iodine, or certain medications like lithium.
Symptoms of Thyroid Disease
Symptoms of hyperthyroidism may include:
Sweating
Irregular heartbeat
Weight loss
Protruding eyes
Nervousness
Symptoms of hypothyroidism may include:
Tiredness
Weight gain
Depression
Abnormal bone development
Stunted growth
Other signs of thyroid disease include changes in your tolerance for hot or cold temperatures, menstrual cycle, energy level, or mood.
Diagnosing Thyroid Disease
Thyroid disease can be tricky to diagnose because its symptoms can resemble those of other conditions. Your doctor may use the following tests to determine if you have a thyroid issue:
Blood tests: Measure the amount of thyroid hormones in your blood.
Imaging tests: A thyroid scan or ultrasound can check for enlargement, shape, or growths.
Physical exams: Your doctor may feel your neck for any growths or enlargement of the thyroid.
Iodine uptake tests: Track the amount of iodine absorbed by your thyroid gland.
You can also perform a simple at-home test to check for lumps or bumps on your thyroid by following these steps.
Treating Thyroid Disease
Treatment for thyroid disease depends on the type and cause of your condition. Options may include:
Hyperthyroidism treatment: Radioactive iodine treatment, antithyroid medication, or surgery.
Hypothyroidism treatment: Lifelong thyroid hormone replacement, typically with manmade forms of thyroid hormone like levothyroxine.
Thyroid cancer treatment: Surgical removal of cancerous tissue or the entire thyroid gland (thyroidectomy), along with any affected lymph glands.
It's important to consult your doctor before trying any alternative methods to ensure they won't interfere with your prescribed treatment.
Maintaining Thyroid Health
To support your thyroid health, make sure you're getting enough protein, calcium, magnesium, iodine, B vitamins, vitamin A, and vitamin C in your diet. Avoid products that can raise your blood pressure and heart rate, such as pseudoephedrine, caffeine, morphine, and quinine.
If you suspect you have a thyroid problem, don't hesitate to consult your doctor. With proper diagnosis and treatment, most thyroid disorders can be managed effectively, allowing you to maintain optimal health and well-being. Learn more about thyroid disorders and how to care for your thyroid gland.
The Bottom Line
Most thyroid disorders require lifelong management, but with proper treatment, patients typically see symptom improvement within 6-8 weeks and can maintain normal quality of life. Early detection prevents serious complications like heart problems and bone loss. If you're experiencing unexplained fatigue, weight changes, or heart rhythm issues, Doctronic can help you get the testing and answers you need quickly.
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