My mom has been suffering from arm pain in both of her arm's. She gets pain all the way up and down her arm's. The pain start's when she moves her arm's a certain way. As well as when she goes to pick something up. It even hurts her to squeeze shampoo out of a shampoo bottle. As soon as she is done with a task (ie: Pick up items ect.) the pain goes away. On a scale of 1-10, 10 being really bad pain she rates her pain at 8. But my mom is as tough as nails and has a pretty high pain tolerance. What could be causing this? It has been going on for at least 6 months. Thank You in advance.