"Alcohol flush reaction is colloquially referred to as Asian Flush, Asian Glow, Red Cheeks, Oriental Flush, Big Blush, and Russian Glow. It is a condition where the body cannot break down ingested alcohol completely due to a mutation on the ALDH2 gene. The result is flushing of the face, neck, shoulder, and in some cases, the entire body after consumption of alcohol."

AA Flushing response to alcohol
GG No flushing response to alcohol
AG Flushing response to alcohol

Never had a problem with alcohol, other than hangovers.
My ex-wife though, she used to light up after just a glass of wine.