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.

Tinnitus is the sound of ringing in the ears. It may also be described as roaring, buzzing, hissing, or clicking inside the head. The sounds may come and go. Or they may be ongoing. Read on to learn more.

Detailed information on speech and voice disorders, including spasmodic dysphonia and stuttering

Spasmodic dysphonia is a voice disorder. It causes involuntary spasms in the muscles of the voice box or larynx. This causes the voice to break and have a tight, strained, or strangled sound. Read on to learn more, including causes, symptoms, and treatment.

Detailed information on hair problems, including baldness (alopecia), excessive hairiness (hirsutism), and ingrown hairs

Detailed information on skin growth and skin pigment disorders

Detailed information on granuloma annulare, including symptoms, diagnosis, and treatment

Detailed information on generalized exfoliative dermatitis, including symptoms, causes, and treatment.

A pheochromocytoma is a rare type of tumor. It grows in the middle of an adrenal gland. A pheochromocytoma causes the adrenal glands to make too much of the hormones epinephrine and norepinephrine. These hormones help keep your heart rate and blood pressure normal.