If you accidentally bite the flesh inside your mouth, you should first determine the severity of the injury: 1. If there are some tooth marks on the surface of the mucosa, but there is no breakage, no bleeding, there is generally no need to worry, there will be some pain, after a few days will be good. 2. But if the mucosa breaks down, or even bleeding, but the muscle layer has not been damaged, it is possible that within 1-2 days local ulcers will form. The ulcers will heal in about half a month. This period needs to pay attention to oral hygiene, you can spray local watermelon cream, open throat sword spray to promote healing. 3, if bitten harder, the muscle tissue below the mucosa has been damaged, the mouth is relatively large, you need to take the surgical approach, the injured mucosa and submucosa muscle layer for suture treatment. After suturing the wound will slowly heal, generally about 7 days to remove the stitches, the basic surface of the wound will also heal well.