This symptom may be an early sign of Parkinson’s disease
The symptom, called a “presence hallucination,” is when you feel as though someone is behind you when there’s no one there.
Up Next
What are the signs and symptoms of Parkinson's disease?
What are the first signs and symptoms of Parkinson's?
Loneliness increases risk for Parkinson's disease, study finds
Which Parkinson's disease symptoms progress the fastest?
How is restless leg syndrome related to Parkinson's?
What are the symptoms of tardive dyskinesia?
What causes Parkinson's disease?
What are the early signs of schizophrenia?
What is the typical progression of Parkinson's disease?
What are symptoms of schizophrenia?
