Cold tingling feeling between shoulder blades and full ache. Also sore shoulders and arms. Mild scoliosis. Tender spot by or on spine. What causes?

Nerve compression. Scoliosis can cause some nerve compression in your spine that may be causing your symptoms. Consider seeing a chiropractor or a physical therapist to help you get your symptoms alleviated. They may also help you figure out some exercises that you ca do at home to prevent future problems. Acupuncture or yoga may also be helpful.