Drinking alcohol will lead to lower blood pressure, because after drinking alcohol will be ingested in the body, and the component of alcohol is ethanol. Ethanol in the body’s metabolic process will be converted to acetaldehyde, acetaldehyde has the function of expanding capillaries, after drinking alcohol will appear capillary expansion, a large number of capillary expansion will lead to a reduction in blood pressure, drinking alcohol after the red is also due to the expansion of capillaries. Drinking alcohol can make the blood pressure lower, but can not be sustained to make the blood pressure in a stable lower state, because a few hours after drinking alcohol acetaldehyde will be completely metabolized, after the metabolism of the loss of dilatation of capillaries will be re-constricted. Not only that, the blood pressure will also appear to rebound higher, even higher than the blood pressure before drinking alcohol.