The physical examination of sublingual nerve injury first reveals unilateral or bilateral tongue movement disorder, followed by tongue muscle atrophy and muscle bundle tremor; the mouth and lips are often weak and cannot puff, even if the nostrils are pressed closed with fingers often still cannot puff the cheeks, and can only puff the cheeks when the lips are pressed closed. The palatal arch is paralyzed and the sucking reflex is absent. Tongue muscle atrophy with or without tongue muscle tremor and abnormal brainstem reflexes. How to diagnose signs of hypoglossal nerve injury? To determine whether there is a sublingual nerve injury based on clinical manifestations, signs and complications can make a diagnosis, etc. 1.Symptoms Patients with simple hypoglossal nerve injury may have some nasal eating at the beginning, but no swallowing difficulties, and only when severe, there is obvious speech and swallowing disorders. When there is a posterior group of cerebral nerve injury at the same time, the performance is different, first occurring in rapid meals or drinking, speech and laughter during meals and drinking cause coughing and choking, later swallowing disorder gradually aggravated, in quiet and general conditions, there are also difficulties in eating. The difficulty in swallowing can be due to facial muscle paralysis, which makes the food easily stay in the cheeks, tongue muscle paralysis, which makes the food move to the pharynx, and tongue muscle paralysis, which makes the entrance to the pharynx not fully closed during swallowing, and causes the food, especially liquid, to reflux out of the nostrils, and the transportation of food in the pharynx and esophagus is also more difficult than normal. Finally, chewing is also difficult, and patients are unable to bite hard food and can only eat soft and semi-liquid food. Due to the difficulty in swallowing, food and large amounts of saliva are often retained in the mouth, causing frequent choking and coughing, but the cough is often weak. In the late stage of the disease, the mouth is open, saliva is in the mouth, speech and swallowing are not possible, and the patient must rely on a nasal feeding tube to maintain food intake. Eventually, death often occurs due to aspiration pneumonia, asphyxia and collapse. The earliest symptom of medullary paralysis is often a speech disorder, with speech easily fatigued, especially if the voice needs to be raised and the tone of voice increased. The first difficulty occurs with pharyngeal sounds, then tongue sounds, and finally laryngeal sounds, and this dysarthria gradually turns into nasal eating. 2.Signal examination Firstly, unilateral or bilateral tongue movement disorder is found, followed by tongue muscle atrophy and muscle bundle tremor; the mouth and lips are often weak and cannot puff, that is, using fingers to press the nostrils closed often still cannot puff, can only puff when pressing the mouth and lips closed. The palatal arch is paralyzed and the sucking reflex is absent. Tongue muscle atrophy with or without tongue muscle tremors and abnormal brainstem reflexes.