If you bite yourself, it is considered that the mucous membrane of the mouth and lips is damaged, and it has not improved for a few days. It is believed that the bite infected or formed an ulcer surface. In this case, first, you need to take anti-inflammatory drugs orally. In addition, if you have ulcers, you can smear them with nystatin tablets and take vitamin B2 orally.

Suggestion: Your situation may be that you didn't pay attention to your diet after being bitten, and the local cleaning was improper, which led to secondary infection and needed anti-inflammatory treatment.