Overactivity of the thyroid gland resulting in overproduction of thyroid hormone and increased metabolic rate. Causes include diffuse hyperplasia of the thyroid gland (Graves' disease), single nodule in the thyroid gland, and thyroiditis. The symptoms are related to the increased metabolic rate and include weight loss, fatigue, heat intolerance, excessive sweating, diarrhea, tachycardia, insomnia, muscle weakness, and tremor.
Also known as
overactive thyroid
Includes 25 related subtypes ↓Hide subtypes ↑
- athyreosis
- familial gestational hyperthyroidism
- familial hyperthyroidism due to mutations in TSH receptor
- generalized resistance to thyroid hormone
- Graves disease
- hyperthyroxinemia, familial dysalbuminemic
- hypothalamic hyperthyroidism
- malignant thyroid stimulating hormone producing neoplasm of pituitary gland
- neonatal thyrotoxicosis
- pediatric-onset Graves disease
- primary hyperthyroidism
- secondary hyperthyroidism
- selective pituitary resistance to thyroid hormone
- thyroid crisis
- thyroid ectopia
- thyroid hemiagenesis
- thyroid hormone resistance, generalized, autosomal dominant
- thyroid hormone resistance, generalized, autosomal recessive
- thyroid hypoplasia
- thyrotoxicosis
- toxic diffuse goiter
- toxic multinodular goitre
- toxic thyroid adenoma
- TSH producing pituitary tumor
- TSH-secreting pituitary adenoma
