Nail Pitting: What's Going On With Your Fingernails? - Verywell Health
Nail pitting refers to dents, ridges, or holes in the fingernails or toenails. The dents in the nails can be shallow or deep. It's typically a symptom of another condition, such as psoriasis, an autoimmune disease that causes skin cell overgrowth and buildup. triocean / Getty Images What Is Nail Pitting? Dents, ridges, and holes in the nails can occur due to an issue with how the layers in the superficial nail plate develop. The superficial nail plate is the hard part of the nail that is made up of a type of protein known as keratin, which also makes up your hair and skin. The superficial nail plate protects the skin underneath. One condition often associated with nail pitting is nail psoriasis. Roughly 50% of people with psoriasis also have symptoms that affect their nails. Nail psoriasis is more likely to affect your fingernails than your toenails. Some research has found that people over the age of 40 have nail pitting twi