Repetitive stress injuries like Tendonitis and Carpal Tunnel Syndrome. In fact, I see no less than three new threads on this every week, here on the forums. .
Tinnitus first, daylight second. Blisters, yes, but they're just a bummer on the night before they turn to calluses.
Zambizzi, I never had RSI problems with drumming. I quit learning keyboards in the band and went back to drumming because of my RSI (computer-based work for many years). Drimming was easier on my hands, tho I had some pain when I was young and uncivilised.
Yes to back and knees.
And let's not forget damage caused by over-indulgence and general craziness ...
the pythons are the best!!
Stupidity? There I said it. Too easy.