Wisdom teeth are the third molars of humans and are part of the human oral cavity and are not specifically good or bad. If the wisdom teeth are vertically orthodontic, erupt normally and have opposite jaws, they can help chewing. If the wisdom teeth are not properly positioned and do not erupt properly, they may cause recurrent inflammation, periodontal swelling and pain, which is harmful to the body and needs to be removed. Wisdom teeth that do not erupt completely are called blocked wisdom teeth and are often caused by jawbone degeneration and insufficient space for wisdom teeth to erupt. If there is no abnormality, it can not be treated, pay attention to oral hygiene, generally will not have any effect. If the blocked wisdom tooth causes periodontitis or repeated pain, some patients may also have facial swelling, infection or fever, which may cause pericoronitis, adjacent tooth decay and other diseases, hydrogen peroxide can be applied to rinse, with periodontal debridement, anti-infection treatment, and if necessary, extraction of blocked wisdom tooth. Daily should eat more rough food, through chewing stimulation, promote the normal development of jaw bone, enhance the resistance of tooth body and periodontal tissue. Try to avoid eating sugar or sticky food before going to bed to avoid bacterial fermentation to invade the teeth and induce caries. Maintain oral hygiene, brush teeth thoroughly, and prevent food residue accumulation. Conduct oral examination regularly and deal with the problems in time.