Half of the face paresthesia and toothache are mainly due to the following reasons: First, dental lesions, such as acute pulpitis or root bone lesions, can easily cause toothache and half of the face paresthesia, and at this time, after giving anti-inflammatory drugs orally or intravenously, the symptoms of tooth pain and half of the face pain can be relieved. Secondly, the numbness and toothache of half of the face may be considered as trigeminal neuralgia. Because the second branch of the trigeminal nerve is innervating the skin around the half of the face and teeth, when pain occurs at this time, patients should be asked if there is any viral infection, intracranial tumor or lesion compressing the trigeminal nerve, the symptoms of pain caused by the trigeminal nerve are mainly numbness of the half of the face, patients dare not wash their face and dare not brush their teeth, or the pain of the half of the face and toothache worsen when eating, and the pain The pain is discharge-like and tugging-like sensation.