- Hypothyroidism: The thyroid is underactive and doesn't produce enough hormones. This is the most common thyroid disorder.
- Hyperthyroidism: The thyroid is overactive and produces too many hormones.
- Hashimoto's Thyroiditis: An autoimmune condition that causes the immune system to attack the thyroid, leading to hypothyroidism.
- Graves' Disease: An autoimmune disorder that causes hyperthyroidism.
- Thyroid Nodules: Lumps in the thyroid that may or may not affect function.
- Goiter: An enlarged thyroid gland.