Whether to prick a blister caused by a burn depends on the size of the blister. For smaller, dense blisters, it's generally not necessary to break them, as the fluid can be absorbed naturally. However, it's important to keep the wound clean to avoid secondary injury, and topical burn ointment can be applied. For larger blisters caused by burns, or those with high tension that interfere with daily activities or life, and are difficult to absorb, you can sterilize the area and then use a sterile needle to puncture the base of the blister to drain the fluid. Be sure to thoroughly clean out the fluid inside the blister. However, the blister skin should be kept intact to cover the skin, providing protection, reducing the risk of infection, and promoting recovery.