Learn the most common causes of white spots on nails, a condition known as leukonychia. Plus, experts explain how to treat ...

Up to 30% of people bite their nails. The habit could be a symptom of stress or anxiety. An MD explains what to know; how to kick the habit.

Onychomycosis, or fungal infection of the nail, most often affects the toenails. Infected nails usually have a thick, yellow appearance and can become coarse and brittle (see Figure 4).

These include pulling, picking, biting, or scraping one's hair, skin, or nails. The disorders include trichotillomania (compulsive hair pulling), dermatillomania (compulsive skin picking ...

Parakeratosis pustulosa (PP) is a cause of distal nail inflammation and nail dystrophy that affects a single digit. It is nonpruritic and minimally painful. This distal digital dactylitis is ...