hi, Thank you for providing the brief history of you. A thorough neuromuscular assessment is advised. By your symptoms and other complaints, i will recommend you to undergo physical therapy. The joint stiffness in the shoulder and muscles can be due to various musculoskeletal factors, systemic illness like diabetes, etc. Undergoing physical therapy like - hold relax, contract relax techniques should help you. Also for getting the ROM of the shoulder and elbow you need an assessment and post which the physical therapy. Most cases respond well to physical therapy. Also, for you cervical spine issues, taking physical therapy will of choice, as due to any nerve pinching symptoms things can trouble later stages, like pain, numbness, weakness etc. Most patients respond well to physical therapy in my clinical practice Regards Jay Indravadan Patel