Gray nails that is nail fungal disease, mild gray nails according to the following different subtypes show different symptoms, early symptoms are mild, common distal nail plate warping, nail plate white spots, etc.. Gray fingernails i.e. nail fungal disease. Symptoms of different types are as follows: 1. Distal lateral subnail nail fungal disease: the most common type, minor lesions are often manifested as the distal end of the nail plate warping, some patients will be separated from the nail plate and the nail bed, etc., and in severe cases, the nail plate will be broken. 2. superficial white spot nail fungal disease: this type of patients will appear on the nail plate white, opaque white fuzzy spots or grooves, can be gradually fused together, and will eventually become yellowish-white nail plate. 3. Proximal subnail nail fungal disease: white spots appear on the proximal “crescent” part of the nail, and then continuously move to the distal end and expand, and then there will be redness, swelling and pain in the nail groove. If the patient has the above symptoms, need to timely to the hospital dermatology consultation, according to the doctor’s advice for appropriate examination and treatment, nail fungal disease of the longer course, and easy to recur, and to develop good hygiene habits for the treatment of the disease is essential.