Forearm and hand problems!!?

Lately when i squeeze my hand or open a bottle cap, and i squeeze hard, my hand kind of gets stuck in that position, and then lets go. I dont feel any pain just a wierd sensation like my hand is stuck and i have no control. a couple of seconds after i get full motion. it seems like my forearm plays a big role in... show more Lately when i squeeze my hand or open a bottle cap, and i squeeze hard, my hand kind of gets stuck in that position, and then lets go. I dont feel any pain just a wierd sensation like my hand is stuck and i have no control. a couple of seconds after i get full motion. it seems like my forearm plays a big role in this as the sensetation is felt there also. i have no idea what this is and what caused it. if anybody has any clue please let me know..
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