Hello, there is a big blister. You must go to the nearest community hospital and let the doctor handle it. The doctor may also dress your wound, but note that he will cover the wound with a layer of sterile gauze first. This gauze is very breathable, so don't think it is as effective as a band-aid. Severe burns must be treated according to the doctor's advice, otherwise it may prolong the recovery time, bring more inconvenience, or leave scars that should not have been left.