After-effects of wisdom teeth extraction: nerve damage, maxillary sinus penetration and so on. 1. Nerve damage, when extracting mandibular molars, if the teeth are close to the nerves of the lower alveoli, improper operation and damage, there will be numbness in the short term, which can be recovered after a period of time; however, if it leads to nerve damage, it may be numbness for a long time. 2. Maxillary sinus penetration: Because the fracture of the maxillary sinus is weak, so if the maxillary wisdom teeth are extracted with improper operation, resulting in maxillary sinus penetration, large pieces of sinus floor are dislodged, etc., which is not repaired in time, it will be a permanent injury. In order to avoid the emergence of sequelae, tooth extraction must find a regular oral surgeon, and asked to avoid violence and blind operation. At the same time, we also want to remind the dentist, complexity can not handle, do not try to do it yourself, must be under the guidance of a superior doctor or let the superior doctor to operate.