I jammed my shoulder a few years ago while catching myself in a skateboard fall, and since then, it has had issues, off and on, where during periods where it bothers me, I can't do pushups or dumbbell work. The injury has been in the aggravated period for the last several months, and is showing no signs of getting better. It is affecting my workouts, at least those involving chest/back/shoulders (i.e. any exercises that involve pressure on the shoulder).
I've seen chiropractors with little success. I haven't tried physical therapy, and I haven't gone to a specialist through my Primary Care Phsyician. Stretching and yoga also not a big help. The injury doesn't get worse, and doesn't get better.. Just is there, slightly annoying, and especially annoying with certain exercises.