Just wondering if someone could explain the ins and outs of alcohol and having post concussion syndrome. Since my accident in June I have a very low tolerance of alcohol the very few times I have drunk, and I start to feel sick when I drink it. I was just wondering how it all worked in relation to having a poorly brain, and also if I should still be staying off alcohol 100% - easier said than done when you're 21 with a bunch of friends who like hitting the town, however much cheaper!!