How long does it take for a blister to subside on its own without being picked depends on the extent of the burn, the size of the blister, your own constitution, etc., and requires a case-by-case analysis. If the blister formed by the burn is small in scope and volume, such as 1cm or so, it can usually subside on its own within 1 week. If the blisters are larger, the absorption time will be relatively longer, taking 2 weeks or even longer. If the burns are more serious and the blisters are larger, affecting daily life or work, you need to go to the burn department of a regular hospital in a timely manner and have a professional doctor operate, under strict disinfection, to draw out the contents of the blisters or pick through the blisters and use sterile gauze for pressure bandaging to protect the wound and promote healing. If a blister forms after a burn, you can follow the doctor’s instructions to use medication or apply burn ointment, pay attention to keeping the affected area clean and dry, eat a light diet, avoid eating spicy and stimulating foods, and avoid smoking and alcohol.