What nail condition is marked by pitting of the nail?

The condition characterized by pitting of the nail is psoriasis. This is a chronic autoimmune skin disease that can affect the nails in various ways, including causing small depressions or pits on the nail surface, which is one of the distinctive features. Psoriasis can also lead to other nail abnormalities, such as thickening, discoloration, and even separation of the nail from the nail bed.

In contrast, eczema primarily affects the skin with inflammation and irritation, but does not typically result in pitting of the nails. Alopecia areata is a condition that leads to hair loss and does not directly affect nail texture or appearance. Onychogryphosis refers to thickened and curved nails and is generally associated with neglect or other health issues, not with pitting. Therefore, the accurate identification of psoriasis as the cause of nail pitting aligns perfectly with the recognized clinical manifestations of the disorder.