After suffering for about 3 weeks, I went to the doctor's and got a cortisone injection today - not the first I've had but the first in my LEFT arm. I remember about 4 hours after the injection the pain got worse so am not looking forward to the next few hours! I don't even play tennis!!
I do worry about steroids though, especially since I have to take steroids periodically because of my chest complaint. I believe it thins the skin and bone.