Tooth numbness is usually caused by gingivitis, periodontitis, dental caries, periapical periodontitis, trigeminal neuralgia, or trauma, etc., which need to be treated in time once found. 1. Gingivitis, periodontitis is caused by some factors lead to local plaque aggregation, such as food impaction, tooth misalignment and crowding or poor restorations, etc., will lead to plaque accumulation and thus triggered by gingivitis, which often manifests itself as numbness of the gums and localized pain and so on. 2. Dental caries, apical periodontitis is due to bacterial infection and other factors leading to the destruction of the hard tissue of the dentin, can also be manifested as numbness or soreness of the teeth. 3. Trigeminal nerve episodes of severe pain can also cause numbness of the teeth, facial twitching and other symptoms, if the teeth are traumatized, can also lead to chronic necrosis of the dental nerve or reduced activity, and then the symptoms of numbness of the teeth. Numbness of the teeth, need to actively seek medical advice, follow the doctor’s instructions for reasonable treatment.