Well I can not remember if I had my flu shot on the right or left side back in early fall, but my left shoulder outside and towards the front of the shoulder and back hurt very much, and sometimes I feel like poor curcuilation is in my left arm, tingly feeling to my fingers, I am diabitic class 2, did have a quad bypass 3 years ago, this pain actually got very bad around December of 08 and since I have been laid off since Jan 3rd have really not performed any hard physical work, even typing like now hurts some, I did have a EKG in December it was ok ...I did take some 800 MG IP for several weeks and it helped some but then it created another problem, make the rectal area sore and like infection was draining off of it, I quit taking and it seems to have reduced the rectal problem by 95% , took Advil it also seemed to help, I have found what helps the most is Activ ON Joint and Muscle in the roll on tube, wow this stuff is great !!! but still dosn't tell me what is wrong, being lais off I cannot afford to seek medical help , I know though its very painful, hard for me to sleep, can only sleep on one side .... any help would be appreciated