Hypothyroidism

Key facts Hypothyroidism (underactive thyroid) occurs when the thyroid gland does not make enough thyroid hormone. Symptoms vary, but can include fatigue, weight gain, heavy periods or sensitivity to the cold. The most common cause of hypothyroidism in Australia is the autoimmune disease, Hashimoto’s disease. Your doctor will diagnose hypothyroidism after referring you for a blood test. Hypothyroidism is often treated with a synthetic version of the hormone thyroxine. What is hypothyroidism (underactive thyroid)? Hypothyroidism (underactive thyroid) is a medical condition where the thyroid gland does not make enough thyroid hormone for normal body function. The thyroid gland is located in the