Commonly known as “gray nails” or “goose claw wind” in Chinese medicine, it is now called nail fungus, which is caused by a large group of microbial infections called pathogenic fungi. Tinea nail lesions begin at the distal end of the nail, the lateral edge, or the nail fold, and appear as abnormalities in nail color and shape. It usually starts on 1-2 finger (toe) nails, but in severe cases all finger (toe) nails can be affected. The affected nail plate loses its luster, and the nail plate becomes brittle and breaks off over time. Mostly grayish white, and lose luster; nail plate thickening significantly, the surface is uneven. The texture is loose and fragmented, and there are often keratin and debris deposits under the nail. Sometimes, the nail plate can be separated from the nail bed. Symptoms of Gray Nails. 1. The most common causative agent of onychomycosis is Trichophyton rubrum. 2, There are two types of onychomycosis. One type of onychomycosis is a white nail, which often starts at the nail root, with small white dots on the surface of the nail plate and gradually expands, causing the nail plate to become soft and sunken. The other type of damage starts at the free edge of the nail and the side wall, causing small depressions or transverse nail grooves to appear on the nail plate, which gradually develop until the nail plate becomes brittle, fragile, thickened, and brown inside. The accumulation of debris under the nail is often easy to make the nail hollow, buckle and nail bed separation, the surface of the nail plate uneven, rough and lusterless. 4, nail fungus nail plate often shows uneven, black, nail plate often has mild atrophy, but not thickened, often with nail furrow inflammation. The treatment of gray nail: 1, conventional internal medicine treatment, fluconazole (150mg twice a week for 6-12 weeks) or itraconazole, 200mg twice a day for 7 days stop 21 days for a course of treatment, nail fungal disease served 2-3 courses, toenail fungal disease served 3-4 courses, etc.. 2.External application of amorolfine nail coating, ciclopirox nail coating. 3, combined treatment, nail extraction or nail chipping therapy plus internal drug system treatment and external antifungal drug comprehensive treatment. 4.Nail sealing therapy.