The adverse consequences of patients biting their lips frequently, including easy to induce chronic labyrinthitis, facial deformity, temporomandibular joint disorder syndrome, etc., as follows: 1, chronic labyrinthitis: the mucosal tissue of the lip area is very delicate and fragile, if repeatedly stimulate the local mucosal tissue, it is easy to induce chronic labyrinthitis, making the lip area dry and flaky, the symptoms of serious will lead to long-term recurrent redness, swelling, bleeding, erosion of the lips. 2, facial deformities: frequent lip biting can lead to facial deformities such as anterior protrusion of the upper front teeth, external fan, or anterior protrusion of the lower jaw. 3, temporomandibular joint disorder syndrome: people who often bite their lips will lead to the recurrence of this movement of the lower jaw, which can easily induce temporomandibular joint disorders, making the joint area pain, joint popping and a series of other symptoms. The symptoms occur.