Alcohol flush is linked to how sensitive you are to alcohol. If you experience a red glow after a few beers, it may suggest you have a lower tolerance to the alcohol inside your drinks. Medical News Today explains that once you've drunk an alcoholic beverage, your body starts metabolizing the ethanol to process the alcohol and flush it out. If you drink at a moderate pace and don't drink too much, then your body will normally be able to keep up with you. However, if you drink lots over a short period of time or if you're especially sensitive to alcohol, the process won't happen fast enough. The blood vessels in your face may dilate, and that's what causes redness.
Healthline explains that, while alcohol flush can happen to anyone, some people are more susceptible. Around 8% of the world's population experience redness, with Japanese, Chinese, and Korean people most likely to. This means that your genetics may have some bearing on whether you get alcohol flush.
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