Snoring in comatose patients may be caused by obstruction of airway, obstruction of airway itself or primary diseases affecting the nerves and so on. 1. Obstruction of airway: When comatose patients lie down, their tongue will fall back and block the airway, and comatose patients will not expel phlegm on their own, and secretions such as phlegm may block the airway, which will lead to snoring. 2. Obstruction of the airway itself; if the patient is in coma caused by heart failure, the heart failure itself can cause circulatory disorders causing edema of the airway, which will easily lead to snoring. 3. Primary diseases affecting the nerves: if the coma is caused by cerebrovascular diseases, etc., due to cerebral hemorrhage, cerebral infarction, etc., which can affect the function of nerve cells in the brain, it may directly or indirectly affect the function of respiration, which will lead to easy snoring. When caring for comatose patients, it is necessary to pay attention to observation, and once abnormal symptoms appear, it is necessary to promptly consult a doctor or call a doctor for standardized treatment. In addition, once a comatose patient is found to be snoring, it is recommended that the patient be helped to change to a side-lying position, which can alleviate a series of symptoms caused by airway obstruction to a certain extent.