A little over a week ago I was hospitalized for a day after fracturing my skull (causing a concussion and brain bleed) while longboarding. Currently I've stopped taking any medication (tylenol 3) and my headaches haven't come back for 3 days. Bright lights and loud noises don't bother me anymore either, it feels like I'm pretty much back to normal, although I don't plan on hooping on my board for three more weeks or so. My question is would substances like tobacco, marijuana, and alcohol have any effect on my brain and skulls recovery? I realize the overall negative effects of each substance, but I'm more and only interested in the direct effects those substance will have on my injuries recovery. Thanks for your time.