05/12/2026
The hallmark symptom of ME is post-exertional malaise (PEM). It’s sometimes referred to as post-exertional neuroimmune exhaustion (PENE). Rough acronym but it is a more accurate name.
PEM/PENE is a “crash” that occurs 24-48 hours after activity. It’s particularly insidious because you may not realize how badly you overdid it for a couple of days.
So let’s say I went to church on Sunday. This involved (1) travel, (2) social interaction, and (3) heavy sensory input of lights and sounds.
I *may* be okay Monday. (Well, at baseline, anyway.) But then Tuesday, I go to get out of bed and I can’t. I will have to be “frog walked” to the bathroom. I’ll be laying in bed except to eat. The room will be dark and quiet. The exhaustion is terrible. The pain is worse. It involves bone, muscle, and nerve pain in addition to a cranked up migraine.
Sometimes, I will have gotten up on Tuesday but, at some point, my body just powers down.
PEM crashes can last anywhere from a day to months. They are somewhat predictable but not completely. The duration and severity depend upon how much I pushed past what I should have done, how other aspects of my health are, and even what the weather is like.
The other fun aspect of crashes is that every time I crash, I risk lowering my baseline (normal level of function). It takes a lot of pacing and a lot of not crashing to increase my baseline. If you crash too much, some people never regain their function. Some people have gotten so sick, they’ve died.
I lost so much function because, when I first got sick, I told myself I was the exception. I could keep working and, as long as I rested, I would be fine.
My last day at work ended with me passing out in my office, coming to consciousness only to discover my legs wouldn’t work. They didn’t work for four hours. It was one of the scariest days of my life!
While it’s not as bad as it used to be, crashes are still scary. Life stops. The world shrinks from small to minuscule.
When someone you know with ME / Long Covid says we’d love to do something with you but we can’t, know we aren’t lying. We would love to be at church or meet you for lunch or a movie or a concert. Normal life is so appealing!
Unfortunately, we have to think about the inordinate impact that activity will have on our health. It’s not fair. In fact, it’s ridiculously unfair.
It’s also our reality.