Toothache and numbness of tongue may be triggered by diseases such as pulpitis, periapical periodontitis and facial neuritis. 1. Pulpitis: Pulpitis causes severe pain in the pulp of the teeth, and this pain can radiate to the mandibular nerve, glossopharyngeal nerve, etc., thus causing numbness of the tongue. 2. Periapical neuritis: It is also caused by inflammation that stimulates the nerves, resulting in tooth pain and numbness of the tongue. 3. facial neuritis: it is caused by facial neurological inflammation, if it is neuralgia, it will lead to the nerve of the dental bed, pain sensitivity, which leads to toothache and numbness of the tongue. Toothache and numbness of the tongue may also be seen in, facial tumors and other diseases, if the symptoms of toothache and numbness of the tongue, persistent and unrelieved, you need to seek medical treatment.