Patients can not sleep after drinking alcohol, mainly consider the excitatory effect of alcohol on the nerves of the brain, after drinking alcohol, headache, gastrointestinal discomfort, the stimulation of alcohol metabolites, etc., as follows: First, it may be related to the excitatory effect of alcohol on the nerves of the patient’s brain: generally seen in small amounts of alcohol, because alcohol may lead to the dilatation of blood vessels, the nerves of the brain are in a state of excitement, people have a sense of euphoria Therefore, it is not easy to fall asleep. Second, after drinking alcohol appeared headache, gastrointestinal tract discomfort: If it is a large number of cases of drinking alcohol, can not sleep after drinking alcohol may be because the patient after drinking alcohol appeared headache, gastrointestinal tract discomfort, irritation and other symptoms caused by the person in pain, gastrointestinal tract discomfort, will affect sleep. Third, the stimulation of alcohol metabolites: the process of alcohol metabolism in the body will produce acid, which will cause stimulation and impact on the central nervous system, so it will also cause patients to have dizziness, insomnia, dreaminess and excitement symptoms.