Lots of things: You're giving a very general sort of description of something that has many causes. So the short answer: Infections, sheer cold temperature, anemia/ low blood volume, seizure disorder, Parkinson's, Essential Tremor, electrolyte disturbances, low functioning adrenal glands, medication side effect, severe anxiety, anticipation of the next tray of hospital food that hits the room in 10 minutes....
Answered 6/17/2014
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4 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
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