How can i tell if i'm grinding my rotator cuff?

Pain & stiffness : In the shoulder joint, certain movement bother more than other, like scratching your back, reaching above your head all symptoms increase with activity and over head work.

New Information: Although many physicians and patients are under the impression that a bone spur is grinding or tearing the rotator cuff, our current knowledge confirms this isn't the case. Learn more here: http://theshouldercenter.Com/rotator-cuff-tear.Htm and http://www.Theshouldercenter.Com/shoulderpain/2013/shoulder-surgery/spur-acromioplasty-impingement/.