Dermatophytosis is a fungal infection of the skin, hair, and nail plate caused by different fungi. Dermatophytosis is contagious and can be transmitted through skin-to-skin contact or by sharing towels, etc. Currently, the following ointments are commonly used to treat ringworm: 1. Miconazole ointment: It is a broad-spectrum antibacterial drug that has antibacterial effects on dermatophytes, Candida, etc. It is suitable for skin and nail infections caused by fungi, yeasts and other fungal infections, such as tinea corporis, tinea cruris, ringworm, etc.; 2. Ketoconazole ointment: It is also an antifungal drug and can be used to treat ringworm, tinea pedis, tinea corporis, tinea cruris, ringworm, etc. If patients experience local burning sensation, redness and swelling during use, it is recommended to stop the drug immediately and rinse the local drug with water; 3. Terbinafine cream: It is an arylamine antifungal drug that inhibits squalene epoxidase in the fungal cell wall, causing squalene lipid droplets to gather in the fungal cells, destroying cell membrane integrity and inhibiting fungal growth; 4. Butenafine cream: It is a more common clinical treatment for skin ringworm infection, can inhibit the fungal cell membrane ergosterol synthesis, the fungal cells have a destructive effect, so as to achieve the role of fungicide and fungus inhibition.