The right side of the tooth pain may be the right side of the dentin sensitivity, cryptocleidosis, caries, or pulpitis and other diseases caused by the following. 1. Dentin sensitivity: Exposure of dentin due to gingival recession, wedge-shaped defects, wear and other reasons will cause dentin sensitivity, teeth in the cold, hot, acidic and sweet and mechanical stimulation will appear pain symptoms. 2. Cracked teeth: teeth due to their own structural defects or excessive joint force cracks, cracks near the pulp can lead to pulp congestion or pulpitis, resulting in tooth pain. 3. Caries: When caries reaches the deep dentin layer and is close to the pulp, it can cause tooth pain due to the entry of food or cold water into the cavity. 4. Pulpitis: acute pulpitis can be manifested as spontaneous paroxysmal pain, night pain, toothache can not be localized, etc., chronic pulpitis can be manifested as spontaneous dull pain. There may be other reasons for the toothache, it is recommended to go to the hospital in time, to clarify the cause of the disease for targeted treatment.