Hi
@DigitalDrifter I think I may be one of your tribe, but I want to understand a bit better what you mean by deteriorative. So I'll share my experience first, and then ask a few questions.
My experience: After a year and a half of improving and 6 months of being essentially recovered, I relapsed and for the next 10 years I got worse, working my way from mild through moderate to severe. Mercifully I stopped before very severe. I would jump down a level following overexertion like a medical appointment, be much more unwell for months, and then when the worst of that subsided I would find that I was simply a lot worse than I used to be. I had a new floor and a new, much lower, ceiling, which I bashed my figurative head against a lot, because I didn't know where it was. And that cycle continued, with the floor falling out from under me again, and then the scramble to figure out what I could safely do at this new level. For the past 4 years I have stabilised at the level I was after the 10 years of deterioration, ie the lowest level I've been. But I haven't had a substantial "worsening" of my ME/CFS in 4 years.
Healthcare professionals did believe me. But they didn't know why it was happening and they couldn't help. Some called me "atypical".
I found it hard that PEM was often described in terms of days, or phrases like "or even weeks", and for me it was weeks/months/years, and really a bit meaningless at that point because what was happening was better described as deterioration or worsening.
It was a bit frightening for me and my family.
What do you think is the correct label for such patients? Which organisations (For example: The WHO) are responsible for giving us the correct label?
To describe my experience when I was getting worse, I would say that my ME/CFS was deteriorating/worsening over time, and that my response to overexertion could last many months and leave me at a lower level than I was before.
I don't think any organisation gives a label to people with any illness who get worse over time. As others have said, MS might be relevant. There's primary progressive MS, where the person gets worse over time without any remissions. And there's secondary progressive MS, where the person starts by having some remissions, but then becomes progressive. My experience would be akin to the secondary progressive type. The term "progressive" wouldn't be appropriate for someone who gets much more ill for a year and then bounces back up to where they were or close to it - that would be relapsing-remitting.
ME is not the only illness with deteriorative symptoms, Autism for example can cause deteriorative sensory intolerance as in my case, however I've never seen this acknowledged in published research, only in patient communities.
Can you explain how this looks - is this sensory intolerance that gets worse and worse with every passing year, so that at any given point it is the worst it's ever been? Or is it sensory intolerance that can get significantly worse for weeks/ months/years after a trigger? Or something else? I'm trying to make sure I know exactly what you mean.
Deteriorative doesn't necessarily mean very severe, you can be very mild but deteriorate very easily by just exerting beyond your deterioration threshold, and the consequences can in some cases be permanent, not denying that some/many recover to some extent.
So if someone very mild climbs a mountain and gets worse, let's say to moderate, and stays there for 3 months and then goes back to being very mild, would they be in your category of deteriorative? Tell me more about how a deteriorative very mild person would present, so that I can distinguish them from someone with fluctuating or even relapsing-remitting illness.