Red spots on the body after drinking alcohol may be alcohol allergy. Red spots on the body after drinking alcohol may be a manifestation of alcohol allergy, while the cause of alcohol allergy is due to the lack of the enzyme acetaldehyde converting enzyme in the body, which results in an allergic reaction of the skin. Alcohol allergy can be categorized into two types, namely rapid-onset and delayed-onset. Rapid-onset symptoms appear early and progress quickly, in addition to skin redness and swelling and itching, there may also be edema of the larynx; while late-onset symptoms appear later and symptoms are relatively mild, generally for the whole body or local skin itching, redness and swelling, and so on. Therefore, if small red spots appear on the body after drinking alcohol, it is recommended to stop drinking immediately, and pay attention to their own symptoms, if the symptoms are not relieved or persistently aggravated, it is recommended to consult a doctor in time in order to avoid adverse consequences.