If the surface is not smooth, you may lack zinc, calcium, or vitamin A, or you could be developing a skin disorder like eczema or psoriasis. Pitting - tiny dents - often links to these conditions. Changes may look like shallow craters or gentle waves. Psoriasis is a leading cause, and nail severity often mirrors skin flare intensity. Disorders such as alopecia areata and lichen planus can also create pits. Care focuses on controlling the underlying disease; gentle nail hygiene helps prevent further harm.
