It's possible!: Depending on which knuckle is involved - if the knuckle that hurts is one that was supporting the wt of the ball the joint could be strained when the fingers leave the holes of the ball. Not very common, but possible. It is usually best treated by applying a cold pack for 20 min at a time, and resting the joint. See your doctor if the pain doesn't show signs of improvement in a few days.
Answered 5/22/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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