Cross-infection will not occur when teeth are extracted in a formal medical institution, but if teeth are extracted in an irregular place, it may lead to cross-infection, as follows. The medical staff, surgical instruments and air in the treatment room of a formal medical institution will be sterilized according to strict disinfection standards, and under normal circumstances, no cross-infection will occur during tooth extraction. Informal facilities may have a weak sense of asepsis among medical staff, repeated use of instruments, incomplete sterilization, etc. Pulling teeth in such an environment greatly increases the risk of cross-infection. It is recommended that if there is a need for tooth extraction, you should visit a formal medical institution and receive professional treatment with the help of a doctor.