The danger of wisdom teeth mainly lies in the front tooth decay and pericoronitis caused by wisdom tooth blockage. Wisdom tooth is the last big tooth to erupt in the mouth, if there is a wisdom tooth, the normal is thirty-two teeth, some people may have one or four wisdom teeth vary, and some people have no wisdom tooth eruption for life. If the jawbone cannot accommodate the wisdom teeth and there is a lack of space, the wisdom teeth can become blocked in different ways and cause some degree of harm to the person’s body. The wisdom tooth is commonly associated with caries of adjacent teeth. The process of wisdom tooth eruption produces a compressive force on the front teeth, resulting in compressive resorption of the front teeth, which can cause crown caries of the teeth, and in serious cases, can lead to pericoronitis of the wisdom tooth, or irreversible resorption of the root of the tooth, which will eventually lead to the loss of the tooth. The danger of wisdom tooth also includes wisdom tooth pericoronitis, wisdom tooth blockage, far in the gum covering part of the tooth to form a blind pocket, bacterial growth will lead to pericoronitis, serious will lead to mouth opening restrictions, some may cause osteomyelitis of the jaw bone, and even sepsis life-threatening. Therefore, the danger of wisdom teeth may lead to pulpitis in neighboring teeth, or to pericoronitis, or even life-threatening in severe cases.