It is not normal to be unable to open your mouth for 15 days after tooth extraction, it may be infected, and it is recommended to go to the medical institution in time. 1. Tooth extraction is a common treatment in dentistry, trauma will occur during the extraction process, so the symptoms of pain may occur 1~3 days after extraction, with the repair of tissues, the symptoms of pain will be gradually relieved, if there is a serious infection, pathogenic microorganisms multiply resulting in tissue swelling, activity is inconvenient, difficult to open the mouth, it is recommended that timely to the stomatology department for treatment. 2. When there is a need for tooth extraction, it is necessary to go to a professional medical institution and have the tooth extracted under the evaluation of a professional physician. After the extraction, it is necessary to take good postoperative care under the guidance of the physician, and it is not possible to gargle and brush the teeth on the day of the extraction, and don’t use the tip of the tongue to lick or suck on the wound. 3. If the tooth is extracted during acute inflammation or complex tooth and blocked tooth extraction, antibiotics such as metronidazole and cephalosporin can be given to control the infection before and after the operation, and the use of medication should be in accordance with the doctor’s instructions.