The white film after tearing of mouth ulcers is composed of secretions of mouth ulcers, food residues, saliva, etc. It can be treated by methods such as improving life style and medication. 1. Improve lifestyle: oral ulcers torn with white film patients should pay attention to keep the mouth clean, you can use mouthwash rinse, try not to tear the white film part, because the mucous membrane of the white film, the inside of the bright red wound play a certain protective role, to avoid external stimuli aggravate the pain of the ulcer. 2. medication: oral ulcers tear open the white film that oral ulcers are healing, the immune cells have defeated the germs, began to repair the broken tissue, you can follow the doctor’s instructions to use oral ulcers stickers, oral ulcers, iodine glycerin, oral spray and other drugs for external application, to promote the healing of ulcers. Patients with mouth ulcers are advised to go to the hospital in time for examination and standardized treatment under the guidance of the doctor, and to avoid spicy, cold and other stimulating products in daily life, and to eat a light diet.