Wisdom tooth extraction does not necessarily cause harm to the body, but after the extraction of wisdom teeth there may be wound infection, alveolar bone fracture, nerve damage, maxillary sinus penetration and other dangers. 1. Wound infection: clinically, due to the part of the wisdom tooth obstruction or ambulatory growth state, extraction is more difficult, and the extraction wound is relatively large, thus making the postoperative wound infection rate increased greatly. 2. Alveolar bone fracture: Wisdom teeth are located at the end of the dental arch, where the thickness of the alveolar bone is weak. Removing mandibular wisdom teeth is prone to the risk of lingual plate fracture, while removing maxillary wisdom teeth is prone to the risk of fracture of the maxillary tuberosity. 3. Nerve damage: the roots of mandibular wisdom teeth tend to compress the inferior alveolar nerve canal, improper operation during wisdom teeth removal may lead to inferior alveolar nerve damage, resulting in lip paralysis, tongue numbness and other symptoms. 4. Maxillary sinus penetration: Part of the maxillary wisdom teeth due to the growth of the location near the maxillary sinus, the removal process, if not properly operated, can easily lead to the maxillary sinus penetration, resulting in headaches, runny nose, maxillary sinusitis and other symptoms of discomfort. The removal of wisdom teeth teeth, is not completely risk-free, there may be some harm to the body, but if the wisdom teeth are not removed in time, there may be neighboring teeth caries, gap infection or even cysts and other problems, it is recommended that it is best to go to a regular dental hospital for examination before removal.