Over the years, I mentioned it to his doctors, whichever one we were seeing at the time. They always looked at me like I was nuts, and that they didn't believe a person could be struck by lightning twice. not seek medical treatment either time and survive. But he was stubborn.
I found some articles about it and now feel somewhat vindicated. What I believe happened was that the lightning damaged the myelin sheath of his nervous system. But the exact mechanism by which lightning causes POTS isn't totally understood.
I'm here to tell you lightning can and does strike twice.
Central Hyperadrenergic State After Lightning Strike
New Onset Postural Tachycardia Syndrome Following Lightning Injury PDF file