1.What are grey nails and what are the main symptoms of patients? What causes gray nails? Gray nail is a disease caused by ringworm that invades the nail plate or under the nail. The main manifestation is the appearance of small white dots, small depressions or nail transverse grooves on the surface of the fingernails, which gradually expand and develop to make the nail plate soft and sunken or brittle, fragile or thickened, the nail surface is uneven, rough and lusterless, yellowish brown or black, and the accumulation of debris under the nail often makes the nail hollow, buckle and nail bed separated, and even nail furuncle infection occurs. 2.What people are prone to gray nails? Is it contagious? What are the ways of transmission? It is common in the south and is more common among housewives, cooks, and people who often work with water or wear rubber shoes, suggesting that it is related to humidity and sweaty hands and feet. The disease is contagious and is spread by sharing toiletries and slippers. Local trauma makes the skin mucous membrane is not completed and lose its protective function is also one of the ways of disease. 3, gray nails in addition to affect the beauty, what other hazards? The actual fact is that you will find a lot of people who have a long history of recurring problems, which can be accompanied by acute and chronic nail infections, which can make the local skin red, swollen and painful. 4, walking around the streets, there are many stores that treat gray nails, can gray nails be cured? It can be cured clinically, but there is the problem of recurrence. 5.What are the main methods of treatment for gray nails at present? The main two methods include internal and external use. Internal medicine is mainly antifungal medicine, which is effective and has a good prognosis, but internal medicine requires a long course of treatment, and there are problems with the toxic side effects of drugs. Topical medications are also effective for patients with a short history, light infections, and a small number of affected nails, and many drugs have been improved in dosage form to increase the penetration of drugs through the nail plate, making topical medications more effective in treating onychomycosis.