Ringworm, also known as tinea versicolor, is a skin disease caused by a fungal infection, for which there is no specific treatment. The main pathogenic bacteria of ringworm are red trichophyton, plaster-like trichophyton and flocculent epidermal fungi; there will be single or multiple red pinhead-sized pimples or blisters after the disease, and then fusion, presenting clear boundary patches; the rash gradually extends outward, the center regresses, and the shape looks like a copper penny, so it is named. For the treatment of children’s tinea cruris, commonly used medications include 1% econazole cream; the effect of the medication varies from person to person, so there is no so-called special-effective medication for the treatment. Children’s ringworm is contagious, it is recommended to consult the dermatology department of the hospital, and under the professional guidance of the doctor for treatment; children’s clothes, towels and bathtubs should not be shared with other people, in order to avoid infecting others. All of the above medications should be used under the guidance of a doctor.