Dental paralysis may be caused by trauma, dental caries, gingivitis and other reasons. 1. Trauma: due to trauma to the teeth, resulting in reduced activity of the dental nerve or chronic necrosis of the dental nerve, so that it loses its response to external stimuli, the symptoms of dental paralysis. 2. Dental caries: due to bacterial infection and other factors leading to the destruction of the hard tissue of the teeth, often manifested in tooth pain, paralysis and other symptoms, especially in the case of stimulation, the pain will be aggravated. 3. Gingivitis: caused by some factors leading to local plaque aggregation, such as misalignment and crowding of teeth, food impaction, bad restorations, etc., will promote the accumulation of plaque, thus triggering gingivitis, often manifested as local pain in the gums, paralysis and other symptoms. It is recommended that patients with paralyzed teeth go to the hospital in time and follow the doctor’s instructions for treatment to avoid delay.