The main causes of thyroid problems are as follows:

Main causes of thyroid problems
Autoimmune disorders: The most common cause is when the body’s immune system attacks its own thyroid gland.

Hashimoto’s Thyroiditis: This causes the gland to function less (Hypothyroidism).

Graves’ Disease: This causes the thyroid to produce too much (Hyperthyroidism).

 

Iodine deficiency: The body needs iodine to produce thyroid hormone. A lack of iodine in the diet can affect the function of the gland.

Genetic causes: If your family (mother, father, siblings) have thyroid problems, you are more likely to develop them.

Thyroiditis: Inflammation of the gland due to infections or other causes can cause changes in hormone production.

Pregnancy: Some women experience changes in thyroid function after giving birth.

Medications: Some medications (such as those used for depression) can affect thyroid function.