Foot fungus is known as tinea pedis in medicine, children with tinea pedis long blisters should avoid scratching to prevent blisters from rupturing and infecting other places, according to the area of tinea pedis long blisters to choose topical treatment or oral medication. 1. topical treatment: to the local application of antifungal drugs, can be applied to Butenafine hydrochloride cream, terbinafine hydrochloride cream or ketoconazole cream, and pay attention to prevent children from scratching to break the blisters. 2. Oral medication: If the blister area is large or the effect of external medication is not obvious, oral antifungal medication such as terbinafine hydrochloride tablets and itraconazole can be used. Weekday attention to maintain family and personal hygiene, and pay attention to keep the foot dry, and at the same time suggest that timely take the child as soon as possible to see a doctor, according to the doctor’s instructions, to avoid blind use of drugs.