hi, thank-you for providing the brief history of you. A thorough neuromuscular assessment is advised. Based on your past and present history you need a thoroguh neuromuscular assessment. As this can help us differentiate between between the tendonitis and also the cervical disc degenerative changes. As you had a previous history of tendonitis, a clinical special test for the shoulder and cervical spine will be performed by a physician. If it is diagnosed as tendonitis then, taking physical therapy for it will be advised to you. Post which the use of therapeutic ultrasound therapy will be performed to reduce the inflammation. Later stages exercises to strengthen the shoulder girdle muscles will be taught. In case if the cervical spine disc degenerative changes clinical special test comes positive than an MRI will be advised and based on the soft tissue status in the spine the extent of injury will be measured. you will be advised to undergo physical therapy for this as well for TENS therapy to reduce the shocking pain. And later stages, Strengthening the muscles of the neck, upper back and upper limb will be taught. With the help of the physical therapy the symptoms will come into control and later on you can practice the exercises at home. In my clinical experience in the early stages of both conditions, the recovery is early. in some cases there is a delay of 2-3 weeks based on the extent of the injury. But achieving 99% strength is still possible. Regards Jay Indravadan Patel