Parkinson’s disease can be difficult to detect, sometimes even for doctors. That’s because the symptoms can be very mild at first. They can also be different for one person to the next. For example, one person may experience hallucinations, but another person may never have them. In addition, the disease doesn’t move at the same pace for everyone. If you’re concerned about Parkinson’s disease in an older relative, here are 7 signs to look for.