When I was cracking my thumb today it started to kill after how do I know wht I did to it. Like it hurts really bad if I move it in a circular motion and itkinda hurts to write but if its just sitting there not moving it doesnt hurt. Its at the second joint of the thumb like the one in the middle of the joint close to the fingernail and the beginning of the wrist. Is it broken or does it just hurt?