Medically reviewed by Jennifer Steinhoff, MD Collarbone pain is usually caused by an injury, such as a fracture or joint ...

When it affects the left elbow, it can cause left arm pain. Left arm pain can be caused by an injury such as a bone fracture, bruise, or tendonitis. A broken bone can cause significant pain ...

Pain in your left arm can be due to a number ... or the humerus — the upper arm bone. How to treat it: If you think you have a broken arm you should see a doctor as soon as possible.