Around a month ago, I sustained a serious contusion to my right arm on the ulnar side approx. 1 inch from the elbow during a fall. The swelling and pain seemingly indicated a broken ulna. I was in a splint and sling for three days, after which a followup appointment determined that the bone was OK. During these 3 days, the affected hand and arm were very swollen (described as +2 edema by this doctor).
After the splint and sling were removed, the swelling receded somewhat, but left behind numbness in the thumb and forefinger and radial side of the forearm, which eventually progressed to whole hand numbness. The hand tends to swell greatly during the day (though not as badly as above), and recede somewhat at night, though the numbness mostly remains static. Also, the affected arm has an issue, too - upon extension and flexion of the elbow, there is a sharp pain on the radial forearm about 2 inches past the wrist. This happens worst when my arm "reaches", as opposed to simple extension. The pain from this action can ache all the way through the thumb to the arm. Finally, the elbow area often aches when it is used much.
I have seen my doctor, who seemed utterly unconcerned. Initially I was prescribed 100mg celecoxib, which made no noticeable difference, but now I finished that and am using OTC painkillers.