I have shoulder pain every now and then. It started when Little man was a baby. Went to the Dr. and she told me it was sprang, from carrying him around in the car seat. 3 years later I still have pain, not constant tho, comes and goes. But my whole arm will hurt and I get a tingling in my hand at times and will have to shake it to get it to stop. Sometimes I just sit with my arm dangling because the pain is so bad. I have a big investment in muscle rub companies.