Gray nails, also known as onychomycosis, are caused by infection with pathogenic bacteria such as Trichophyton rubrum, etc. In summer, general treatment, medication, surgery and other treatments should be given to intervene. 1. General treatment: attention should be paid to maintaining the hygiene of the affected area in daily life, trimming nails diligently, and avoiding sharing washbasin, towel and other daily necessities with others. 2. Drug treatment: patients can follow the doctor’s instructions to use topical antifungal drugs such as amorphophallus powder for treatment, and can also take oral itraconazole and other drugs under the guidance of the doctor. After the use of drugs, especially the use of oral drugs, patients may have liver function abnormalities, drug rash, nausea and other adverse reactions, it is recommended to stop the drug immediately, and go to the regular hospital in a timely manner. 3. Surgery: For patients with stubborn condition and poor drug treatment, nail extraction and nail removal can be adopted as appropriate, but due to the pain of this method, it is less commonly used at present. 4. other treatments: such as laser treatment, photodynamic therapy, etc., also need to combine with other treatments, in order to achieve better therapeutic effect. It is recommended that patients with onychomycosis should go to regular hospitals in time, and standardize the treatment under the guidance of doctors, and do not use medication on their own to cause serious adverse reactions.