My 77 year old PD husband had a horrible three months getting our taxes ready. This is a man who took advanced math courses in college to RAISE his grade average. He couldn't concentrate, felt awful to have his brain "shot.". He started having trouble breathing, no energy, no appetite, horrible restless legs, no sleep and gained 20 pounds. He was pretty much slamming up against the wall most of the time. He acted daffy and I felt like running away from home.
The day after he finally got those taxes in, he woke up with a much clearer head, found himself smiling and had enough energy to get back on his exercise bike. He is planning outings and complaining about being bored .Instead of the ball of misery I was living with, who appeared to be on his way to needing a care home, he is back to being a man who can enjoy life.
I looked up stress and it stated that stress tightens all the muscles, causes big problems ,including those to the brain. It immobilizes. I totally believe that now. He will never be allowed to do taxes again if I have my way. He took a diuretic and lost 20 pounds. None of his doctors could find a reason for his fatigue and dyspnea. They did heart and lung tests. As far as I can tell now, stress can have a lot to do with PD symptoms seeming worse. More pills don't help. Relaxing, and some exercise does.
I'm an RN, so I don't believe this was a "pie in the sky" happening. It really works to avoid stress.