Parotid meatus is the buccal mucosa, wisdom teeth bite to the buccal mucosa has been whitened may occur traumatic ulcers, the primary treatment measures for the removal of wisdom teeth, at the same time can be used anti-inflammatory and antiseptic drugs, such as iodine glycerin, Chlorhexidine solution, etc., to prevent secondary infections. The primary treatment for traumatic ulcers is to remove the irritating factor, i.e. removal of wisdom teeth. At the same time, anti-inflammatory and antiseptic drugs are used, such as local application of iodine glycerin, ice boron powder, etc., or gargling chlorhexidine solution, compound boric acid solution, etc., in order to prevent secondary infections and promote the recovery of soft tissues. All of the above medications should be used under the guidance of a doctor, and it is recommended to go to the hospital in a timely manner to receive regular treatment as soon as possible.