I had a Prolia injection given on my upper left arm, on Tuesday. I started having rather uncomfortable muscle pain on the left side of my neck a few hours later. It hasn t gone away, nor has it improved that much. I ve been trying to figure out what I have done that could have contributed to this pain, and can t think of anything. I just looked up side effects to Prolia, and it does mention muscle pain. What, if anything, do I do?