The appearance of redness and burning after drinking may be a normal physiological phenomenon, or it may be caused by the lack of acetaldehyde dehydrogenase in the body or alcohol allergy. You need to identify the specific cause of redness and burning after drinking alcohol, and then carry out general treatment, drug treatment and so on. 1. Normal physiological phenomenon: If the speed of drinking is too fast, the body can not metabolize ethanol in time, which can lead to redness and burning. This is a normal physiological phenomenon, will not cause harm to the body, usually pay attention to the speed of drinking can be. 2. Lack of acetaldehyde dehydrogenase in the body: alcohol metabolism in the body can be metabolized from ethanol through acetaldehyde, acetic acid, and ultimately metabolized to water and carbon dioxide. If the content of acetaldehyde dehydrogenase is insufficient, it can make acetaldehyde accumulate in the body. Because acetaldehyde can have the effect of vasodilatation, so it can lead to redness and burning after drinking. This situation is mostly due to heredity, it is recommended to drink less alcohol. 3. Alcohol allergy: If you are allergic to alcohol, it can lead to the phenomenon of redness and burning after drinking. It is recommended to apply pimecrolimus, tacrolimus ointment and other calcium-modulated phosphatase inhibitors under the guidance of a doctor, and take antihistamines such as loratadine orally, which can effectively alleviate the phenomenon of redness and burning. When the above situation occurs, it is recommended to go to the hospital in time, and the medication should be used according to the doctor’s instructions.