A jagged tongue is usually a sign of dentition, mostly in obese patients or those who are under excessive stress. If the patient is obese, it is likely that the tongue body is too large, resulting in an environment in the mouth that is too small to accommodate the tongue body, which can cause more serious tooth marks. Such patients must actively engage in physical exercise, which can reduce the size of the tongue body. If tooth marks appear frequently, it will also greatly increase the probability of developing tongue cancer. If the patient is not obese, but has a stressful job and often has the tongue clenched against the teeth, it can also lead to tooth marks on the tongue and even inflammatory hyperplasia-like changes over time. Patients must consciously protect the tongue to avoid this condition and correct poor oral hygiene habits.