This is why some people turn red when they drink alcohol

When it comes to our drinking habits, we would say we’re pretty clued up. We’re well aware that men and women’s ideas about how much you should drink on a first dateare largely different, and although alcohol has no real medicinal value, you can drink Gin guilt-free knowing that it could actually be a cure for your hay fever.
http://www.marieclaire.co.uk/life/food-drink/people-turn-red-alcohol-522589