Has anyone ever had an extreme reaction to Poison Oak that involved a sore, aching appendage near the affected area? I have a severe but small patch of Poison Oak on my left elbow/forearm area, and ever since the rash started to get bad, my whole lower arm and left hand have been sore and aching to the point of not being able to pick up moderately heavy items with that hand (my laptop, for example). Is this normal? Should I be concerned? This has been going on for a little more than a week so far.