I have swelling above the right collar bone. I broke that arm about 6 months ago and the swelling began right after I had the cast removed and as I began to work the arm again. Is this simply a long side effect of the broken arm?
Not usually. The lymphatic and venous return to the body from the body, actually goes through the axilla (armpit), then into the chest reason. The return of the edema does not go above the clavicle (collarbone).
Usually, swelling above the clavicle comes from the head and neck region.
Unless your fracture involved the shoulder and clavicle, it is highly unlikely this swelling is from the fracture.
You should have it checked out by your physician. Good luck.