Okay here are the symptoms bad pain in my left shoulder when doing flat bench ( almost feels like its under the muscle of the shoulder) never felt any pull or strain when in the gym just last week i woke up feeling like i had slept on it funny but once i tried to bench i had pain so i shut it down for the week then went back today tried flat and it hurt i couldn't even unrack my working set weight. i decided to see what movements bugged it, i did incline dumbells and didn't seem to have any problem did pecdeck and still no pain. I have not had any discolor or anything like that i dont bounce the weight and thought i had pretty good form i work my way up with 2 or three warm up sets and stretching...any help is greatly appreciated