Hi
Welcome to the MedHelp forum!
If you are a lady, and on birth control pills then alcohol could have aggravated the bruising that these pills can cause. The other possibility is a dip in Vit K following alcohol use. It an also be an allergic reaction to some ingredient such as yeast, preservative, gluten, coloring agent etc.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
it could be that and it could also be you have clots of blood but then again when that happens it looks like a bruise...so it could just be from the alchol..brittany