Thyroid disease is a general term for a medical condition that keeps your thyroid from making the right amount of hormones. Your thyroid typically makes hormones that keep your body functioning normally.

Conditions that can cause hypothyroidism include:

Thyroiditis: This condition is an inflammation (swelling) of the thyroid gland.

Hashimoto’s thyroiditis: A painless disease, Hashimoto’s thyroiditis is an autoimmune condition where the body’s cells attack and damage the thyroid.

Iodine deficiency: Iodine is used by the thyroid to produce hormones.