Itching and blisters on the inside of the toes and feet are considered tinea pedis, which is caused by a fungal infection. Tinea pedis can be divided into blistering, scaly keratosis, and macerated erosion. If you have the blistering type of tinea pedis, active antifungal treatment is recommended. Topical medications including miconazole nitrate and terbinafine hydrochloride ointment can be used topically twice a day for up to 4 weeks. If the effect is not obvious, it can be combined with oral antifungal drugs such as itraconazole capsules and terbinafine hydrochloride tablets. Before and after using antifungal drugs orally, liver function tests can be performed and used when the liver function is normal. Along with the treatment, active prevention is also very important. Avoid cross-infection, avoid trips to dirty water on rainy days, and keep your own shoes and socks dry, ventilated and changed regularly, so that the environment suitable for fungal growth is destroyed and tinea pedis is less likely to recur.