Itchy body after drinking may be caused by alcohol allergy, alcohol intolerance or skin diseases. 1. Alcohol allergy: itchy body after drinking alcohol may be caused by alcohol allergy, may also be brewing process of Aspergillus allergy caused by people allergic to this type of alcohol, after drinking alcohol will appear itchy body. 2. Alcohol intolerance: Itchy body after drinking may also be caused by the lack of enzymes that promote alcohol metabolism. Because of the enzyme deficiency, it can lead to symptoms such as skin congestion and facial warmth soon after drinking alcohol. It can also cause itchy body after drinking. 3. Skin diseases: If the patient himself exists eczema, neurodermatitis and other skin diseases, drinking alcohol will stimulate the skin, resulting in accelerated blood circulation, the patient’s own skin disease is induced or aggravated, there will be itching after drinking. If the symptoms of itchy body after drinking, you should promptly consult a doctor for examination and treatment under the guidance of a doctor after a clear diagnosis.