Frequent biting into the inner walls of the mouth may be due to abnormal occlusal relationships, possibly due to heavy tooth wear, producing abnormal tooth overlap and coverage, which makes it easy to bite into the inner walls of the mouth. In addition, it may also be due to temporomandibular joint disorder, which can also produce misalignment of the bite and appear to bite into the inner wall of the mouth. In this case, usually, a sympathetic treatment and a treatment of the temporomandibular joint are required, and if necessary, surgery is needed. If there is swelling of the buccal mucosa in the mouth and blockage of the salivary gland ducts, there is also a possibility of frequent biting. If there are missing teeth or atrophy of the jawbone, there is also a possibility of biting into the lining of the mouth. In this case, for wounds, you can apply medications that promote healing, such as recombinant human epidermal growth factor gel or topical solutions. To maintain oral hygiene, appropriate use of chlorhexidine rinse, compound tinidazole rinse, gargle.