The inner side of the teeth is always grinding the tongue may be caused by the tooth’s coverage is too small or the tip of the tooth is too sharp, you need to adjust the grinding tip bevel or too sharp tip. 1. Small coverage. The inner side of the teeth is always grinding the tongue may be covered too small, when the denture repair, the upper and lower jaw teeth arrangement axis close to vertical, the composite coverage of the teeth is too small, easy to cause the phenomenon of biting the tongue, can be adjusted to grind the mandibular non-functional cusp buccal bevels and maxillary functional cusp lingual bevels, if the situation can not be improved need to consider the prosthesis remodeling. 2. Sharp teeth. When one’s own teeth are too sharp, it is easy to bite the tongue when chewing up and down, and it can be adjusted and rounded clinically. The inner side of the teeth is always grinding the tongue, it is recommended to go to the hospital in time to check the cause of timely treatment, to avoid causing soft tissue damage.