The third molar is generally referred to as the third permanent molar, and the pain after extraction is considered to be a symptom of incomplete healing of the wound, or it may be the production of dry socket syndrome. 1. The wound is not healed, the periodontal tissues and fibrous nerves are affected by the extraction of the tooth will produce pain symptoms, it takes a period of time to recover, in the absence of a full recovery before the pain symptoms may be produced, this situation is relatively normal. 2. Dry socket, if you do not do a good job of post-care work, resulting in wound infection or sterilization is not strict, may induce dry socket, so it will produce tooth extraction and pain symptoms. After the tooth extraction is completed, you need to maintain a good diet, avoid spicy stimulation, so as not to stimulate the cavity, resulting in pain aggravation.