The main causes of hand tremor after drinking are excitement, hypoglycemic reaction and ataxia. 1. Excitement: after drinking alcohol can be stimulated by the symptoms of excitement, and easily combined with emotional excitement, which can appear hand shaking symptoms. 2. Hypoglycemic reaction: after drinking alcohol, blood sugar will be reduced reactively, and people with hypoglycemia will have obvious palpitations, hand tremors and other phenomena. 3. Ataxia: alcohol is absorbed into acetaldehyde, acetaldehyde can another capillary expansion and let the body into three sections, respectively, is the excitement stage, ataxia stage, coma sleep section, ataxia period will appear hand shaking symptoms. If the symptoms of drinking hand tremors are serious, it is recommended to actively seek medical attention to identify the cause and carry out targeted treatment.