The ease of wisdom tooth removal depends on the location of the wisdom tooth, the direction of growth of the wisdom tooth, the shape and length of the wisdom tooth root, and the amount of bone and soft tissue resistance above the wisdom tooth. Generally speaking, maxillary wisdom teeth are easier to remove because the alveolar bone in the upper jaw is relatively loose, and the bone resistance will be smaller during the extraction process. In addition, most of the roots of maxillary wisdom teeth are fused, which is also easier to remove, and the swelling and pain of the tissues after the extraction is relatively small. The mandibular wisdom teeth are more difficult to remove, the mandible in the wisdom teeth part of the bone density is very large, the bone resistance is very large, and many of the mandibular wisdom teeth are blocked teeth, or even completely buried wisdom teeth, this kind of wisdom teeth in the extraction process even need to cut through the mucous membrane to remove the bone resistance, and then amputation of crowns, split the root of the wisdom teeth in order to be able to pull out the pieces, in the extraction process will cause greater damage to the soft and hard tissues, and will also cause facial redness and pain after surgery. After the operation, there will be redness, swelling and pain in the face.