Is Parkinsons disease preventing you from sleeping

Most Parkinson's patients often have sleep issues and it is found that 2 out of 3 people with Parkinson's have this problem. Parkinson s (PD) is a neurological disorder which damages nerve cells and gets worse as time passes. Parkinson s mostly cause motor symptoms like problems in balancing, stiff muscles etc. But there are non-motor symptoms like sleep problems, change of smell or vision etc. And it is found that sleep disorder is an early sign of Parkinson s.