Ringworm is a fungal disease, its mycelium and spores are contagious, and the pathogen is highly resistant to harsh environments, so life isolation is recommended. The most common form of ringworm, i.e. foot fungus, in addition to the patient’s own rash, the infectious mycelium and spores are also widely present in the patient’s personal belongings, such as socks, clothing, bedding, slippers, footbaths, etc. In addition to infecting other people, this also increases the risk of the patient’s own reinfection, especially for those with diabetes, or immunocompromised populations who have applied glucocorticosteroids such as prednisone over a long period of time, and the risk of infection is even greater. Attention should be paid to the separate use of household items and frequent scalding and boiling of contacts. The treatment of ringworm is relatively single, except for onychomycosis and generalized tinea corporis, general ringworm, tinea cruris, tinea corporis, etc., separate topical antifungal medication can be used, such as Auqin cream, Dakinin ointment, etc., once a night, alternating, adhere to the 4-week period, to prevent recurrence. For ringworm of the nail, because the nail is hard and slow-growing, general topical drugs are difficult to penetrate, the first oral itraconazole shock therapy, lack of the drug can also be used terbinafine alternative. Ringworm is one of the most common skin diseases in life, not harmful but easy to repeat, timely treatment, good isolation and sterilization is the key to treatment.