Foot long blisters, if it is tinea pedis, you can use topical clotrimazole ointment, terbinafine cream; eczema, you can use topical zinc oxide ointment, boric acid solution; contact dermatitis, medicinal rashes, etc., topical compound dexamethasone ointment, tretinoin cream and so on. 1. Tinea pedis: fungal infections cause blistering tinea pedis, which can cause feet to grow blisters and itchy symptoms. It can be treated with topical antifungal drugs such as clotrimazole ointment and terbinafine cream. 2. Eczema: Inflammatory skin reactions caused by internal and external stimuli can cause blisters and itching. When there is exudation, zinc oxide ointment, boric acid solution can be used externally, and glucocorticoid cream and other medications can be used after the exudation is reduced. 3. Contact dermatitis, drug rash: is due to allergic reaction caused by blisters, most will be accompanied by itching and so on. Glucocorticoid drugs such as compound dexamethasone ointment and tretinoin cream can be used externally. Foot blisters may have other causes need to go to the hospital first check, follow the doctor’s instructions for treatment, to avoid their own abuse of drugs.