It is recommended to apply cold compress for the first three days after operation: you can put a refrigerated towel into a plastic bag or wrap an ice bag with gauze to apply cold compress to the local area for 20 minutes each time; Hot compress after three days: wrap a hot towel in a fresh-keeping bag and apply it to your face. The water temperature should not be too high during hot compress. Avoid wetting the wound dressing with water for 20 minutes at a time. The swelling can be obviously reduced in a week or so.