The cause of redness and rapid heartbeat after drinking alcohol may be caused by excessive accumulation of acetaldehyde in the body. Alcohol, also known as ethanol, is absorbed in the digestive tract as a result of excessive drinking, and ethanol is absorbed in the digestive tract through the action of liver peroxidase to generate a large amount of acetaldehyde. Acetaldehyde often leads to peripheral vasodilatation, and the dilation of the blood vessels in the face can cause the symptoms of flushing. Rapid heartbeat is mainly due to multiple peripheral vasodilatation, which leads to a reduction in blood volume, which leads to a reduction in the amount of blood returning to the heart, and finally activates the negative feedback reflex in the body, stimulating the heart and causing the symptoms of rapid heartbeat. This is why blushing and rapid heartbeat often occur after drinking alcohol. At the same time, a small dose of alcohol acts on the brain, resulting in excitation, i.e. euphoria, excitement, etc., which can also cause blushing and rapid heartbeat. When the symptoms of blushing and rapid heartbeat after drinking alcohol are obvious and lead to obvious discomfort, it is necessary to actively consult the doctor and take timely and targeted treatment measures according to the doctor’s instructions.