Scratched skin inside the lips can be dealt with by cleaning the mouth, adjusting lifestyle, medication or surgical treatment. 1. Clean mouth: you can use a soft-bristled toothbrush to clean the teeth, to avoid the hard toothbrush again damage to the skin, rinse your mouth with water after eating, and if necessary, use light saline to clean the mouth, in order to play the role of antiseptic and anti-inflammatory. 2. Adjustment of lifestyle: avoid spicy and stimulating food, prohibit tobacco and alcohol stimulation, light diet, regular work and rest, prohibit late night and so on. 3. medication: you can also use watermelon cream under the guidance of a doctor, and if necessary, the use of medication such as erythromycin. 4. Surgical treatment: If the injury site is deeper, such as the inner wall of the mouth caused by trauma skin breakage, etc., you can carry out the appropriate debridement suture treatment. It is recommended to go to the hospital in time to avoid delaying the condition.