You diagnose hypothyroidism and start her on 100mcg of levothyroxine per day.

Medically reviewed by Kelly Wood, MD Hypothyroidism—or an underactive thyroid—is a condition that happens when the thyroid gland does not produce enough hormones to meet your body’s needs. It doesn’t ...

What is hypothyroidism? “Hypothyroidism is actually quite common and tends to increase with age,” says Dr. Erik Alexander, MD, the chief of the thyroid section at Brigham and Women's Hospital ...

Low TSH. Your test result could also show lower-than-normal levels of TSH and an overactive thyroid. This could be caused by: Graves’ disease (your body’s immune system attacks the thyroid) ...

Hypothyroidism is commonly associated with depression, but symptoms can include anxiety, as well. And anxiety can make hypothyroidism harder to treat. Learn how hypothyroidism and anxiety are ...

Hypothyroidism is when the thyroid gland does not produce enough thyroid hormones, whereas hyperthyroidism is when the thyroid gland produces too much. The conditions have different symptoms and ...

Hypothyroidism, a condition caused by an underactive thyroid, can create a wide variety of symptoms, such as fatigue, weight gain, trouble tolerating the cold, and joint and muscle pain.

Hypothyroidism is a frequent disorder in which the thyroid gland cannot make enough hormones. Symptoms tend to develop gradually and may be subtle, yet they can have a major effect on quality of life.

A thyroid storm or thyroid crisis is a rare but possibly life-threatening condition in which your body suddenly starts overproducing thyroid hormones. Here’s what you should know.

Hypothyroidism often slows metabolism, causing your body to burn fewer calories than normal, and leading to weight gain, according to the American Thyroid Association.

Thyroid nodules are lumps that can develop on the thyroid gland. They may be solid and look dark on an ultrasound scan. Most are benign, but there is a low risk of thyroid cancer. The thyroid is a ...