Tinea capitis, commonly known as gray nails, is caused by infection of the nail with dermatophytes, or nail fungus if the lesion is caused by non-dermatophytes. Tinea nail fungus begins at the distal, lateral edges or folds of the nail and is abnormal in color and shape, mostly grayish yellow, with no luster and significant nail plate thickening and uneven surface. There is often an accumulation of debris under the nail. The nail plate can be separated from the nail bed. You can usually treat gray nails with topical antifungal medications such as Gray Nails, Bright Nails, Nail Sleek, Soft Cream, Compound Ketoconazole Ointment, etc. First of all, the nails should be softened and scraped thin with scissors before applying the cream, which can make the medication penetrate effectively. You can also take broad-spectrum antifungal medications such as Spironolactone capsules orally, but you need to rule out liver damage beforehand. The appearance of gray nails is usually seen in patients with fungal infections such as foot fungus. The treatment of gray nails should be accompanied by effective treatment of foot fungus, otherwise it is prone to recurrence or not easily cured. Normally, you should pay attention to the hygiene and cleanliness of the skin, keep your feet dry, pay attention to the hygiene and disinfection of shoes and socks, and do not mix shoes. With gray nails it is best not to wear high heels and not to use alkaline soap. When doing housework, it is recommended to wear gloves. Rub hand cream after washing your hands to prevent bacteria from entering the inner layer of your fingernails and causing infection. Nail fungus and nail fungus is not a difficult disease to treat with active prevention and treatment to effectively prevent fungal infections.