Wisdom teeth are located in the third molar position, next to the second molar. Not all wisdom teeth should be extracted, depending on the position and direction of the wisdom teeth. Generally, wisdom teeth that are removed are not in the right position, affecting the position of the adjacent teeth and limiting their own growth, and may cause necrosis of the wisdom teeth themselves or cause food residue between the wisdom teeth and the adjacent teeth, resulting in necrosis of the second molar. The wisdom teeth in the wrong position will also often rub against the internal mucosa of the mouth, causing recurrent oral ulcers. In addition, wisdom teeth are located in the third molar, the last side of the alveolar, which will affect the cleaning of the teeth, if the wisdom teeth are not properly positioned, they can hardly be cleaned, and the lack of cleaning can also cause inflammation and the formation of tooth decay, which can also cause swelling and pain of the surrounding gums and even pus, and in serious cases, cellulitis, which requires hospitalization. For malpositioned wisdom teeth, they must be extracted, as they not only affect their own growth, but also affect the surrounding teeth and other soft tissues. Wisdom teeth that are in the right position do not need to be removed and do not cause any harm.