Hyperthyroidism means your thyroid gland is too active. Learn more about this condition, such as causes, symptoms, risk factors, diagnosis, treatment, and complications.

Detailed information on radon and radon testing.

Detailed information on environmental disease factors, including mold, air pollution, asthma triggers, carbon monoxide poisoning, lead poisoning, radon, multiple chemical sensitivity, electric and magnetic fields, and Gulf war syndrome

Detailed information on prickly heat, including symptoms and treatment.

Hashimoto’s thyroiditis is the most common type of thyroiditis. Learn more about this condition, including the causes, risk factors, symptoms, and treatment.

Detailed information on pityriasis rosea, including causes, symptoms, diagnosis, and treatment.

Detailed information on the most common types of skin pigment disorders, including albinism, melasma, vitiligo, and skin pigment loss following sun damage.

Diabetes insipidus occurs when your body doesn’t make enough antidiuretic hormone (ADH). Learn more about this rare disease that causes you to urinate often.

Detailed information on the most common parasitic infections of the skin, including creeping eruption, lice, and scabies

This chart shows some common bacterial skin infections and their treatments.