Patients can not sleep after drinking alcohol, mainly consider the excitatory effect of alcohol on the brain nerves, headache, gastrointestinal discomfort, alcohol metabolite stimulation, etc., as follows: First, may be related to the excitatory effect of alcohol on the patient’s cerebral nerves: generally seen in a small amount of alcohol, because alcohol may lead to vasodilatation, the cerebral nerves are in a state of euphoria, the person has a sense of euphoria The patient has a feeling of euphoria, so it is not easy to fall asleep. Second, after drinking alcohol, headache, gastrointestinal discomfort: if a large amount of alcohol, after drinking alcohol can not sleep may be due to the patient after drinking alcohol, headache, gastrointestinal discomfort, irritation and other symptoms caused by the person in pain, gastrointestinal discomfort, it will affect the sleep. Third, the stimulation of alcohol metabolites: alcohol metabolism process in the body, will produce acidic substances, will cause stimulation of the central nervous system, impact, so it will also cause the patient to appear dizziness, insomnia, dreamy, excited symptoms.