Hypothyroidism, short for hypothyroidism, is a condition where the body produces and secretes less thyroid hormone, leading to a group of low metabolic symptoms clinically.The treatment for hypothyroidism is relatively straightforward and can be managed with levothyroxine replacement therapy.Common causes of hypothyroidism include:1. Inflammation of the thyroid itself, such as Hashimoto's thyroiditis.2. After treatment with radioactive iodine - 131.3. Hypothyroidism following thyroid surgery.The clinical manifestations of hypothyroidism may include: sensitivity to cold, reduced sweating, dry and infrequent bowel movements, joint pain, weight gain, memory loss, drowsiness, loss of appetite, and myxedema. In severe cases, pericardial effusion may occur.With levothyroxine replacement therapy to bring hormone levels back to normal, patients can live and work just like anyone else, effectively curing the hypothyroidism.