Kunal Malik, MD, is a board-certified general and cosmetic dermatologist. "Nail pitting refers to small, shallow, deep dents, or depressions that appear on the surface of the fingernails or ...

Nails with small pits or dents could be a sign of psoriasis, an autoimmune condition that affects the skin. Similarly, horizontal ridges or “Beau’s lines” may indicate severe stress or ...