Sudden withdrawal from long-term drinking can lead to withdrawal symptoms, which can be life-threatening in severe cases. During the withdrawal process, a subtle tremor predominates at first, and then gradually develops into a coarse tremor. Many patients who become dependent on alcohol cannot do any work if they do not drink in the morning, and even have difficulty brushing their teeth, washing their faces and eating. Patients show dry heaving and nausea, which can be relieved by drinking alcohol. For example, some patients may wake up in the middle of the night with a profuse sweat, showing irritability, anxiety, depression, and a feeling of being up and down, as if something is not being done. Patients who have been drinking alcohol for a long time develop a craving for alcohol and will experience withdrawal symptoms if they suddenly stop drinking. The withdrawal process needs to be carried out under the guidance of a hospital doctor to prevent safety problems due to withdrawal.