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Many people associate shaky hands with Parkinsonâs disease, but the most common cause of shaking hands is actually essential tremor. Essential tremor is the most common neurologic disorder affecting adults, but itâs not well understood.
Shaking Chills Underlying Cause. When a fever breaks, the temperature drops, and the patient will often experience chills. More violent shaking chills, known as rigors, can be a sign of an underlying streptococcal infection, such as pneumonia. This parasitic blood infection often causes shaking chills, sweats, and high fever. As the body temperature drops, shaking ensues. This is the body's attempt to raise the core temperature.