Uneven nails with small pits may be related to trauma, onychomycosis and nail psoriasis. 1. Trauma: If the nails are damaged by external violence, it may lead to uneven nails with small pits. 2. Ringworm of the nail: the nail plate of patients with ringworm is often cloudy, thickened, atrophic and uneven surface and so on. The cause of the disease is related to the infection of pathogenic bacteria such as Trichophyton rubrum. 3. Nail-type psoriasis: the symptoms of nail-type psoriasis are mostly manifested as thimble-like or point-like depression of the nails, hyperkeratosis under the nails, and separation of nails, etc. The nails of some patients may appear uneven with small pits or yellowing phenomenon. The cause of the disease is related to genetic, immune and infectious factors. There are many causes of uneven nails with pits, so it is recommended that patients seek medical attention to determine the cause of the condition.