People diagnosed with Parkinson’s disease often deal with tremors, stiffness and slow movement. They also may have more than their fair share of a more common complaint.

A little unconscious kick or punch from a partner during sleep isn't too bad, but if nighttime feels like a boxing match, a rare and serious sleep disorder may be to blame.

Rapid eye movement sleep behavior disorder ( RBD ) occurs when people act out dreams. Diagnosis of RBD may increase the risk of developing Parkinson’s or mild cognitive impairment.

Over time, the toll that Parkinson's disease takes on the body and mind gets worse and worse. Although Parkinson's has no cure, finding it early can help patients in many ways. New research shows that early symptoms of the disease can be seen in dream sleep.