I got my flu shot at Walgreens, one month ago in my left shoulder area(high dose, because I turned 60 this year). (I also got a Shingle shot two weeks prior to the flu shot: that did not cause any pain) The flu shot itself did not hurt, but the next day it was sore, which has never happened before. It still is sore and getting progressively worse. It hurts to lay on my left side and can barely lift my arm. I am physically active, do yoga and workout and now am very limited as to what I can do. I tried icing it tonight which didn't help. I will try heat tomorrow. I take Meloxicam for my hip, which was helping my shoulder, but the pain and range of motion is getting worse every day. HELP!!!