Fingers And Hand Start To Itch And Rub Them... Like

fingers and hand start to itch and rub them... like a burning sensation, tingle, and somewhat want to crawl out of my skin. this has been happening about every 6-8 days now and this is the 5-6 time. after 1/2 hour the itching ends and then the hands are sore. cold/heat does not help nor does benedryl to stop itching. joints then get stiff and hands feel like thousands of tinny pin pricks. the next day they will be slightly swolen