First off 2x orals, in my book, are a very bad idea. Are you retaining lot of water? If so its likley excess preasure on the nerves running down the arm to the hand.
I experienced the same feeling on dbol 40 mgs a day during workouts. Especially when my forearms got tight. Certain exercises seemed to aggrevate the numbness. I was certainly retaining water and i attribute the numbness to it. I cut the doseage back to 30 mgs aday and ran a little more. This seemed to help. Other than that i dealt with it. Ikinda liked the feeling a little. It felt like my forearms were going to explode.
Have got the same feeling before, went away about 2 weeks post cycle. i was scared too, but did a search on NUMB HANDS and found out it is actually very common!
This has been discoussed manytimes and it is associated with water retention pinching nerves by your traps which runs down to your elbows and hands. i get it on Anadrol and Dbol. Very common.