Wisdom teeth not only have no chewing function, but also have a series of serious hazards or potential hazards, and are a focal point, so early extraction is the best treatment option. Wisdom teeth with abnormal tooth position, forming a gap with neighboring teeth; wisdom teeth with normal tooth position, but the crown of wisdom teeth covered by bone tissue or gingival flap, often occurring pericoronal soft tissue inflammation, swelling, pain; wisdom teeth have been decayed or pulpitis, and it is not convenient to carry out endodontic treatment; orthodontic needs, such as preventing the back teeth from moving forward and preventing the aggravation of crowding of front teeth. Wisdom teeth in the above cases can be considered for extraction. However, when removing wisdom teeth, the following points must be noted: firstly, pay attention to examine the disinfection conditions and do not go to places where disinfection is not complete to avoid cross infection. Secondly, do not extract teeth when the mouth is inflamed and the body’s resistance is reduced for other reasons. This is because the recovery of the extraction wound is slower at this time, and infection is likely to occur. After tooth extraction, pay attention to rest and take medication as prescribed by the doctor. Some people think that as long as the tooth does not hurt, it does not need to be treated or extracted. If it hurts, it means that it has caused damage to the normal teeth and even to the body, which may cause irreversible damage in the long run, and then it may be too late to pull it out. Many people are aware of the danger of wisdom teeth and the reason why they must be removed, but they hesitate to do so for fear of pain. In fact, the extraction of teeth only requires local anesthesia, and the effect of anesthetic is now so good that the extraction is almost painless.