Don't bubble immediately after boiling water. At this time, it should be washed with cold water immediately, which can reduce the temperature of the scald and relieve the pain. In the absence of scald medicine, toothpaste can be gently applied to the scald for timely treatment. When the blister withers, it should be wrapped with a small piece of gauze to prevent the wound from being infected by collision. Or you can buy some scald medicine at the drugstore. This effect should come faster. Drugs like this should be kept at home.