What proportion of people with ME/CFS who become severe or very severe do so within the first three months? Did you?

Mild for 5 years
Moderate dipping to severe the next 2 years
Severe dipping to very severe sometimes for 3 years (and counting)
… so it’s gradual however my worsening happened overnight both times. The first time, I don’t know why. The second time I had a second round of EPD and I suspect my immune system couldn’t handle it for some reason.
 
I've been mild to mild/moderate throughout, just severe during PEM, which lasts no more than a few days.

My son was the same, expect for a month or so of being severe, probably very severe, after a high level of exertion. He gradually returned to mild/moderate function over about 6 months.
 
I started off as essentially severe during the acute infection, but I did way more than I should. I’ve never been not-sofa-bound for most of the day, even though I’ve exercised because that’s what I was told to do.

I think you’d have to feel extremely bad to go straight to lying in bed all day - or even realising that it’s an option.

I’m still severe.
 
At start, I was moderate quite suddenly although there had been a couple months of weird building symptoms. It onset 4 months after a bad viral infection which was itself 3 months after first proper flu as an adult.

I became severe 2 years later after doing the 2 day cpet for disability insurance. The descent into severe became apparent in the weeks and months after the cpet. I realized my baseline was much lower and all my sensory sentivities and vision distortion that had been only PEM symptoms became 24/7. I went into a six month long bad crash bc I kept trying to do things I’d managed at prior baseline.
 
January 9, 2022:
Prodrome (tingling and burning sensations throughout the body, sudden fatigue after mental exertion, sensitivity to noise, dry eyes and mouth, electric shock sensation in the arm while running). Why? Tramadol and alcohol abuse? Shock 10 days prior during a metal concert (nothing on MRI), untreated Lyme disease (positive Western blot) for years?

January 19, 2022: Positive for COVID-19.

April 2023: Mild. exercise-induced spondylitis after drug and alcohol abuse. Two days later, awakening with illness and panic attack upon exertion, tetany attack, convulsion. Onset of exercise intolerance and panic attacks.

April 2023 - December 2023: 7 cases of strep throat and panick attack. Some PEM but not too many. Panick attack = PEM ? I dont know.

June 2024: Moderate/mild onset of POTS syndrome after an evening of alcohol and exercise two days later.

September 2024: COVID-19.

April 2025: Very severe crash, and I understand I have a MECFS. Before, I was thinking about burnout and POTS si i exercise a lot... what an idiot.

June - September 2025: Severe thanks to LDA (Legg-Calvé-Perthes disease).

October 2025 - present: Very severe after a botched stellate ganglion block performed by an amateur.

I only stopped working and playing sports 3 years after the prodromal symptoms. Note that in 2022 I was more than light, despite a few minor PEM (Post-Extreme Muscle Emergencies) episodes (2 or 3), otherwise I was at 100% for sports and work. Sports were even good for me. Incomprehensible. April 2023: Real turning point.
Very progressive...
 
It took me a year and a bit?

You could argue I was severe for a couple weeks during onset but its really hard to tell if I was spending my days in bed because of recovering from ACL surgery or because ME/CFS had been triggered. Even if it was ME/CFS I‘d consider a couple weeks a crash more than a baseline.

But I improved to very mild quite quickly and only a year and a bit later did I permanently decline to very severe.
 
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