How long the burning sensation lasts depends on the extent and depth of the burn and requires specific analysis of the problem. If it is a degree I burn, the burn site is superficial and may only show a burning sensation, slight redness and swelling, and no blisters are formed, so you can rinse or soak in cold water for half an hour to reduce the burning sensation, which usually improves in about a week. If it is a degree II burn, the epidermis and dermis of the skin are damaged and blisters may be formed, the burning sensation is more obvious and the duration will be relatively longer. In case of Ⅲ degree burns, there may be no burning sensation at this time because the whole layer of the skin is damaged and the sensation is not sensitive or cannot be felt, so you need to go to the hospital burn department in time to be treated by a professional doctor. Patients with burns need to be careful not to apply soy sauce, vinegar, alkali, toothpaste or purple potion and other things on their own to avoid bringing unnecessary trouble to the later treatment and deepening the patient’s degree of injury.