Wisdom teeth extraction is not harmful, but wisdom teeth extraction is more difficult than other teeth, there may be complications, common soft tissue damage, bone tissue damage, nerve damage and temporomandibular joint damage. 1. Soft tissue injury: mainly due to the swelling and bleeding of the tissues caused by the flap or the tearing of the gums during the operation. 2. Bone tissue injury: some complex wisdom teeth extraction needs to remove bone tissue, resulting in postoperative pain and swelling, and some violent operation can lead to jawbone fracture, which requires surgical treatment. 3. Nerve damage: Wisdom teeth extraction has the risk of nerve damage, buccal nerve damage can lead to facial numbness; lingual nerve damage can lead to numbness of the tip of the tongue on the same side; inferior alveolar nerve damage can lead to numbness of the corner of the mouth and teeth on the same side. Nutritional nerve therapy is required. 4. Temporomandibular joint injury: prolonged large opening or violence can lead to acute injury of temporomandibular joint. Observation or jaw pad treatment is required. The difficulty of wisdom teeth removal is affected by many factors such as anatomical factors, bone quality, etc. Not all wisdom teeth removal is dangerous, it is recommended to go to regular hospital stomatology department for removal.