Hi Dubious,
I had a compressed nerve which caused those symptoms and more. Had surgery and was told it takes 1month to heal 1" of nerve so mine if it worked(I was told that compression release does not always work) would take 7-8months to heal. After surgery i had feelings of bugs crawling under my skin but the burning had backed off. At 6months PT started resistance exercises & my arm began all over again-burn, ache, turn color and temp, sensative to touch and cold and if it is too humid outside. It was then that they realized i also had RSD before surgery-but i would still have done the surgery to try and relieve the nerve. My pain Dr. said unfortunately it is vicious cycle- the nerve damage will continuously irritate the RSD-he was right because now i have full body CRPS.
Sorry to hear of your injury. It sounds to me like your nerve or the RSD is acting up. momof4