Petechiae on the side of the tongue may be caused by dental occlusion disorders or inflammation of the tongue papilla, and need to adjust the occlusion or take antibiotic anti-infection treatment. 1. Adjust the occlusion. If the petechiae on the tongue are caused by occlusal disorders, such as malocclusion, long-term missing teeth, which can cause damage to the mucous membrane of the tongue margins on both sides when biting up and down, resulting in petechiae caused by damage to the tongue mucous membrane, the treatment needs to restore the normal curve of the jaws and prosthetic restoration or orthodontics, and the petechiae will disappear after restoring the normal occlusal relationship. 2. Inflammation of tongue papilla. When the body is malnourished or subjected to external stimuli and other factors, it will cause inflammation of the papilla of the tongue with congestion, redness, swelling and pain, for malnourished people need to supplement nutrition, eat more protein-rich, vitamin-rich foods, inflammation is obvious oral antibiotic amoxicillin, gargle chlorhexidine. The treatment of petechiae on the side of the tongue is related to the cause of the disease, it is recommended to go to the hospital to check the cause of the disease before treatment, the use of medication need to follow the doctor’s instructions.