What is the problem with the numbness of the tongue in the morning? It is mainly due to the following reasons: 1. Ask the patient if he has a recent history of facial neuritis because the facial nerve, in addition to innervating the movement and sensation of the skin of the face, also innervates the sensation of the front 2/3 of the tongue. If there is a history of facial neuritis, there may be a loss of sensation in the anterior 2/3 of the tongue, loss of taste, and numbness. 2. Ask the patient if there is choking and coughing or a feeling of a large tongue when speaking, in addition to a numb tongue. 3, morning numbness of the tongue, ask the patient whether they have recently eaten a lot of eggs, because some patients are prone to lead poisoning after eating a lot of eggs, lead poisoning may violate the nerves, the symptoms of numbness of the tongue.