What Causes Burning Pain On The Shoulder Blades?

Since January, I have suffered from a burning, tender to touch pain in the bottom regional area known as the shoulder blades. The pain will last for several days to a week, then subside. At times, like the last 3 days, it is only in my left blade area. Not sure if this information has anything to do with the pain in my blades, but in the past year, my arms and hands will go numb, almost like they are asleep. It sometimes is so severe, it wakes me from a dead sleep.