I was playing racquetball a few days ago (my first exercise in quite some time) and I ran into the wall a few times with my right shoulder. The next day my arm and shoulder felt a bit sore and still feels a bit sore now, although a bit better. My real concern is that my right arm feels a bit colder than the rest of my body. The pain is fine, there is no bruising, just the slight temperature difference. I would go see a doctor but I'm on a vacation and time is short, so I'd rather not go if I don't need to. What do you guys think? Any input? My current plan is to not see a doctor until it gets worse or stays the same for 3 more days.