Tongue with teeth marks may be caused by missing teeth or overbite. 1 Missing teeth: Under normal circumstances, the tongue and cheek muscles in the mouth are in a state of internal and external balance, when the teeth are missing and have not been repaired and treated, the tongue muscle loses its blockage, and will protrude into the gap between the missing teeth, forming a matching teeth marks. After repairing the missing teeth, it will gradually return to normal. 2 Tight bite: the lower jaw is usually in the mandibular posture when not chewing, and the upper and lower teeth are in a non-contact state at this time. If the patient is in the state of tight bite for a long time, the tongue movement will be impaired, and there will be a form that fits with the tongue surface of the teeth. It is recommended that the jaw cushion treatment, relax the muscles, generally will gradually relieve. It is recommended to go to the regular hospital, after examination to clarify the diagnosis and treatment of the cause.