I mean…for everybody in these comments who are making OP feel stupid for thinking his shakey hands are related to shaking his dick, might I remind you all that theres a whole generation out there that were discouraged from masturbation by saying they’ll go blind, or their palms will get hairy.
At least this guy is (falsely) seeing a real cause and effect. He jerks it, and his hand keeps jerking. It’s reasonable to think “I shook it too much.”
That being said, OP, go see a doctor. Because that’s not a thing. It sounds like you might have parkinsons, or some kind of damaged nerves. I’m not a doctor so I can’t say. But there does sound like some major issue here.
Which makes no sense. Everybody should masturbate. The girls who try to hold a pill between their knees are the most likely to need a morning after pill from wearing their knees as earings.