Pitting of the finger (toe) nail is a symptom of psoriasis involving the nail. Psoriasis of the nail matrix area will show pitting of the nail plate, ridges and grooves, while nail peeling, hyperkeratosis under the nail and ruptured bleeding. Psoriasis, commonly known as psoriasis, is a chronic inflammatory skin disease with a long course, a tendency to recur, and in some cases, almost lifelong. The onset of the disease is predominantly in young adults and has a greater impact on the physical health and mental status of the patient. The clinical manifestations are mainly erythema and scaling, which can develop all over the body, with scalp and extensor side of the limbs being more common, mostly aggravated in winter. Finger (toe) nail dotted depression how to diagnose: 1, finger (toe) nail dotted depression most psoriasis patients have finger (toe) nail damage, deck surface dotted depression, will be nail fungus-like changes, for patients should choose a regular hospital for detailed examination as soon as possible. 2, finger (toe) nail dotted depression is a symptom of psoriasis involving the nail, causing finger (toe) nail dotted depression this disease occurs for a variety of reasons, finger (toe) nail dotted depression this disease is controlled by multiple genes, but also by other external factors, may also be due to bacterial viral infection.