I suffered a concussion a year ago. 97% of the time I'm fine, but I can reawaken the symptoms rather easily. Saturday I jokily headbanged a couple of times while watching a band and got sort of headachy and dizzy immediately afterwards. After going home and resting for a bit, I felt fine, but I've been a bit woozy today (Monday) -- sort of in a fog. No headache, per se, but a very subtle feeling of pressure?

The band I sing for just got a chance to play at one of the bigger small clubs in town tonight. Am I risking making things worse if I play? If so, do you think I could permanently hurt myself or just potentially prolong the decompensation? They tell people with concussions to avoid loud music, but I'm not sure if that's because it delays healing or just because it can aggravate symptoms in the short term.