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| Hypothyroidism | |
|---|---|
| Classification and external resources | |
 Hypothroidism is when the thyroid gland does not make enough thyroid hormone. | |
| ICD-10 | E03.9 |
| ICD-9 | 244.9 |
| DiseasesDB | 6558 |
| MedlinePlus | 000353 |
| eMedicine | med/1145 |
| MeSH | D007037 |
Hypothyroidism is a medical condition. If a person has hypothyroidism, their thyroid gland does not make enough hormones. This condition is also called underactive thyroid. It can be caused by many factors, but it is more common when a person has insufficient iodine. Severe hypothyroidism in infants can result in cretinism. Symptoms of hypothyroidism include the following: tiredness, headaches, weight gain, dry skin, constipation, and poor concentration.
| Symptoms | Signs |
|---|---|
| Fatigue | Dry, coarse skin |
| Feeling cold | Cool extremities |
| Poor memory and concentration | Myxedema (mucopolysaccharide deposits in the skin) |
| Constipation | Hair loss |
| Weight gain with poor appetite | Slow pulse rate |
| Shortness of breath | Swelling of the limbs |
| Hoarse voice | Delayed relaxation of tendon reflexes |
| Heavy periods (and later light periods) | Carpal tunnel syndrome |
| Abnormal sensation | Pleural effusion, ascites, pericardial effusion |
| Poor hearing |
(periorbital bilateral edema)
Can be a sign of different medical disorders including hypothyroidism.
