I have pain that radiates from shoulder blade to arm, armpit upper spinal cord and also causes burning sensation. What could be the cause?

Multiple Things. Many sources can result in referred pain to the shoulder blade. Along with the neurogenic sources like cervical (c6 for example) and the suprascapular nerve, we also see many patients with occult shoulder pathology have referred pain to this area. Patients who are very flexible can also have occult shoulder instability refer pain to this area.

Related Questions

Burning sensation in upper arm with shoulder blade discomfort. Started a couple months ago pretty sure from a work out?

Muscular injury. If this is still persistent this long this merits orthopedic consult. It may be a muscle tear or strain. Have you rested it.? Take time and see the doc. Read more...
Neck. Have your doctor check for a pinched nerve or herniated disc in your neck. Another possible cause could be rotator cuff tear in the shoulder. You should see your doctor for an evaluation. Good Luck. Read more...