Itchy blisters on the back of the heel can be caused by two conditions, and the treatment varies depending on the situation. If eczema causes redness and itchiness in the heel area, the symptoms can slowly improve with the application of dexamethasone ointment, dampicol ointment, or stove glycol lotion for topical application. If the local friction causes blister formation, due to the lack of treatment of the wound and local infection itchy, this situation must be anti-infection treatment, you can generally use external erythromycin ointment, clindamycin ointment, Bactrim and other ointments to sterilize, disinfection treatment, and then oral antibiotics to strengthen the anti-inflammatory, disinfection effect, so as to solve the problem. If the blisters are relatively large must also give puncture, the water inside the drainage healing will be faster.