Gray nail is nail fungus, and the early symptoms of nail fungus are nail color change, nail shape change and so on. 1. Nail color change: in the early stage of onychomycosis, the fungus will invade from the surface of the nail plate of the patient, due to the fungus infection is not particularly serious, but the color of the nails will appear some changes, for example, the color of the nails will be changed from the previous flesh color to white, greyish-white, greyish-yellow, yellow and so on. 2. Nail shape change: the shape change of the nail in the early stage of onychomycosis is usually not particularly serious, which is mainly manifested as the nails may be relatively thickened, the nails are easy to tear, and the nails are easy to be broken, and the nails may be separated or the nails may be detached when it is serious. If the situation of ringworm of the nails, need to timely hospital consultation, under the guidance of the doctor treatment.