Children’s feet long transparent blisters may be caused by physical friction, may also be caused by tinea pedis, according to the specific causes of blister treatment or topical drug treatment. 1. Physical friction: when the child’s shoes do not fit, walk too long or strenuous exercise, can be caused by friction blister formation. You can go to the hospital for blister extraction, use a sterile syringe to extract the blisters, disinfect them with iodine, and apply mupirocin ointment and other drugs to the local pinhole. Pay attention to wear shoes loose and comfortable, avoid repeated friction. 2. Tinea pedis: caused by fungal infections, blisters occurring between the toes, metatarsals and lateral edges of the foot. The lesions are deep blisters of pinpoint size, which can be fused into multi-housed blisters. Larger blisters also need to be drawn out of the blister fluid, and after the blisters subside, topical antifungal drugs such as miconazole nitrate and terbinafine are used to treat the blisters. It is recommended to develop good hygiene habits, follow the doctor’s instructions to standardize the use of drugs, do not blindly use their own drugs.