Hi lynny, I have and still have shoulder pain in my right shoulder mostly. It felt exactly the way you describe it. catches on something. Very hot, sore, and frustrating. I was dx with fibro and rhuemitoid arthritis. I believe my doc said that was arthritis in my shoulder. Although my hip feels the same and he said that may be bursitis. So it is some kind of itis. (inflamation)

OH, I am on Prednisone, since then the pain is much better. Too bad it's not good for the bones.
Good luck with your dx. Hope it's nothing too serious. Laura

Cervical spine surgery 2004, C-section 1986, Cholecystectomy 1999, Thoracic and Lumbar injury 2000. Anxiety/depression 2008. Fibromyalgia 2009, Thyroidectomy 2008. Degenerative disc disease. IBS. Asthma, Rheumitoid Arthritis, Sacroillitis, Scolylosis, disc bulge in L5/S1.possible ankylosing spondylitis. Meds: Lisinophil, xoponex, symbocort, pulmocort, troponal, vitamin 2000 D, Vitamin B complex, Hydrocodone, Tylonal Arthritis, Cymbalta.prednisone and Lyrica