The inner most tooth pain clinically more common is the last tooth, commonly wisdom teeth, the causes of wisdom tooth pain have pulpal reasons, there are also peri-coronary reasons, the pulp is due to wisdom teeth have pulpitis and the pain caused by this pain is relatively rare. The most common cause of wisdom tooth pain is due to wisdom tooth pericoronitis, wisdom tooth pericoronitis is due to the wisdom tooth eruption position is bad and caused by the wisdom tooth as a last eruption of teeth, in its eruption due to the eruption of space is not enough, wisdom tooth often ectopic eruption and the formation of the gap in its surroundings, these gaps are particularly easy to retain bacteria, over time the formation of the wisdom tooth pericoronitis caused by recurring pain, in the period of pain anti-inflammatory treatment, non-painful period of extraction of wisdom tooth In the painful period, anti-inflammatory treatment is given, and in the non-painful period, wisdom teeth are extracted to cure the disease.