The possibility of HIV infection from tooth extraction refers here to the possibility of HIV infection in irregular places where the instruments for tooth extraction are not specially cleaned and sterilized. If the instruments are not sterilized, the blood of HIV patients may be left after the instruments are operated on, and then the instruments are used to operate on healthy people immediately afterwards, because the process of tooth extraction can cause trauma to healthy people, and the blood of HIV patients on the instruments may enter the body of healthy people through the wounds, thus causing AIDS infection. Therefore, if you need to pull teeth, tattoo eyebrows, tattoos, ear piercing and other traumatic operations, you should try to go to a regular, professional institution and use disposable instruments or exclusive use to avoid cross-infection.