Hypothyroidism is a condition in which your thyroid does not make enough of the most important thyroid hormones called triiodothyronine (T-3) and thyroxine (T-4).
Some more common symptoms of hypothyroidism include the following:
Hypothyroidism may be the result of a number of conditions including autoimmune disease, pregnancy, and iodine deficiency.
If left untreated, hypothyroidism can lead to myxedema, a condition that causes tissues to swell, increases fluid around the lungs and heart, and slows down muscle reflexes. A myxedema coma may cause you to lose consciousness, experience trouble breathing, and can potentially lead to heart failure. Hypothyroidism can also cause mental health issues like depression and slowed mental functioning.
Hypothyroidism is usually treated with thyroid hormone medicine. Most symptoms of hypothyroidism start to improve a short time after you begin treatment. All symptoms related to hypothyroidism usually disappear within a few months.