Gray nails do not heal on their own. Gray nails, also known as nail moss, are mostly seen in older and middle-aged people, and the disease develops slowly and is difficult to heal. Gray nails are a clinically common skin disease caused by fungal infections, and their onset is mainly caused by different types of fungal infections. In addition, ringworm, trauma to the nails, wearing public slippers and using public towels may also cause infection with gray nails, and some patients have a relationship with genetic factors and autoimmune diseases. If you have white nails, you need to go to a dermatology hospital for further diagnosis and treatment according to the test results. During the treatment of gray nail, try to eat a light diet, avoid spicy and greasy food, and ensure sufficient sleep.