Cold therapy is the best way to alleviate pain after a burn. Firstly, you should use running tap water or cold water to soak the affected area for more than half an hour. This can prevent heat from continuing to affect the wound and can dull the peripheral nerves in the area, reducing pain, exudation, and swelling. Secondly, you can apply some dilute saltwater to the wound to relieve pain and reduce inflammation, and then apply burn ointment to the burned area. In severe cases, oral pain relievers such as ibuprofen can be taken, and if necessary, pain medication can be administered via muscle injection. If the burned area is large, it is necessary to go to the hospital for formal treatment in a timely manner.