The cause of red spots on the chest from drinking alcohol may be acute urticaria, alcohol allergy and so on. 1. Acute urticaria: alcohol can cause acute urticaria, mainly after the human body contact with alcohol, will stimulate the immune cells to secrete histamine, leukotrienes and other inflammatory mediators, resulting in vasodilatation, increased permeability, thus appearing in the case of red spots on the chest, according to the doctor’s instructions oral levocetirizine hydrochloride tablets, imipramine extended-release tablets, ibrastine tablets and other antihistamine drugs. 2. Alcohol allergy: If you are allergic to alcohol, then drinking alcohol will lead to inflammation of the skin, causing an allergic reaction. It can lead to local skin erythema, accompanied by itching and other symptoms, this situation can be prescribed the use of chlorpheniramine maleate tablets, phenylephrine hydrochloride tablets, cetirizine hydrochloride tablets and other drugs for treatment. It is recommended that patients who drink alcohol and have red spots on their chests should avoid drinking alcohol or drinking alcoholic beverages, and at the same time, they should consult a doctor to find out the specific causes, so as to avoid delaying the condition, and pay attention to the use of medication to follow the doctor’s instructions.