Tendinitis in right shoulder: I suddenly jerked arm and swelling and whole arm pain w/ swollen hand followed. What should be done?

Ice, elevate. If you are having severe pain, numbness, weakness, or tingling, you should have it looked at in urgent care. Sometimes swelling can track between the tissues causing swelling in an area further down the body. Too much can cause other symptoms and should be looked at sooner rather than later.