It is possible to suddenly quit drinking and experience alcohol withdrawal syndrome, which is when a person’s brain has become accustomed to working in an alcoholic environment and suddenly quitting alcohol leads to neurological dysfunction. It is generally categorized into withdrawal mini-seizures, mild withdrawal syndrome, withdrawal grand mal seizures, and withdrawal epilepsy, which usually manifests itself as tremors, weakness, sweating, etc., and in severe cases, convulsions may occur. 1. Withdrawal mini-seizures: mainly manifested as mild symptoms, appearing after 6 to 24 hours of drinking, manifested as dizziness, nausea, vomiting, weakness, sweating, and so on. 2. Mild withdrawal syndrome: manifested by nausea, fatigue, tremor and hyperreflexia. 3. Withdrawal grand mal seizure: usually occurs 72 hours after the last drink, with auditory hallucinations, visual hallucinations, nausea, vomiting, sweating, tremor, and significant sleep disturbances, as well as fluctuations in blood pressure, which is usually manifested as hypertension. 4. Withdrawal epilepsy: It usually occurs 6 to 48 hours after the last drink, and may include foaming at the mouth, spasms or convulsions of the limbs, and in severe cases, cyanosis and confusion. Withdrawal syndrome usually occurs in people who have been drinking heavily for a long period of time, and it is important to quit drinking in a scientific way and in a gradual manner in order to achieve the desired effect. It is also recommended to consult a doctor for assistance with alcohol cessation medication if necessary.