Itchy skin caused by alcohol allergy can be relieved by drinking more water and giving medication. 1. Drink more water. The allergic reaction caused by drinking alcohol is related to the lack of acetaldehyde converting enzyme in the body, which leads to the accumulation of acetaldehyde in the body. By drinking more water, the excretion of ethanol can be promoted, which to a certain extent can alleviate the itchy skin caused by allergy. 2. Medication. For the itchy skin caused by alcohol allergy, appropriate to give some anti-itch medication, help relieve itching symptoms, such as oral levocetirizine capsules, loratadine tablets and so on. For mild alcohol allergy, generally do not need to carry out too much treatment, in the need to choose the drug treatment, must strictly follow the doctor’s instructions for medication.