The causes of itchy blisters on feet include tinea pedis, herpes, sweat herpes, etc. The treatment medications include hormone ointment, anti-allergy ointment, anti-fungal ointment and so on. 1. Tinea pedis: If the blisters on the feet is tinea pedis, then you can give ketoconazole cream, nitroimidazole cream and other drugs antifungal treatment. If necessary, should be combined with oral medication for systemic antifungal treatment. 2. Herpes: If the blisters are caused by herpes virus infection, acyclovir ointment or penciclovir cream can be given antiviral treatment. 3. Sweat herpes: If the blisters are sweat herpes, then you can give tretinoin urea ointment to apply treatment. Itchy blisters on the feet may also have other causes, and the appropriate medication should be chosen according to the cause and severity. It is recommended that patients with similar symptoms consult a specialist for standardized diagnosis and treatment in a timely manner, and do not use drugs indiscriminately.