A dermatologist specializes in the treatment of nails, skin, hair and mucous membranes, according to the American Academy of Dermatology. Ten percent of dermatological conditions involve problems with the nails stemming from disease, nutrition, medication, trauma, chronic illness, fever and the aging process.
As many as half of nail issues involve fungal infections, states the AAD. Most are found on toenails, where warm and moist conditions encourage fungal growth. Bacterial infections are also common and typically caused by nail biting, excessive time in water or poor hygiene. Dermatologists also treat ingrown toenails that result from improper trimming, bad posture and poorly-fitting shoes. Nail abnormalities in color, shape and thickness due to kidney disease, heart and lung conditions, anemia and diabetes are also addressed.