When I broke during the COVID years, it didn't look like a breakdown from the outside. Not at first. It looked like a guy who stopped answering emails. Who couldn't handle a phone call. Who found the sound of the fridge unbearable some days.
I didn't have the words then. I've come to think a good part of it was what autistic people call autistic burnout. I found out I had ASD in the middle of it.
So what is autistic burnout? The short version, from the research: it's a long stretch of deep exhaustion, where you lose skills you used to have and can't tolerate the noise, light and people you used to manage. It builds up over years of strain and of trying to function like everyone else without enough support. And it isn't the same as being tired from your job.
Where the definition comes from
For a long time this was something autistic adults talked about online and clinicians mostly didn't. That changed in 2020, when Dora Raymaker, an autistic researcher, and colleagues from the AASPIRE group published a study called "Having all of your internal resources exhausted beyond measure and being left with no clean-up crew": Defining autistic burnout, in the journal Autism in Adulthood.
That title is a quote from one of the participants. I don't think I've ever read a better description of how it feels.
Their definition says autistic burnout results from "chronic life stress and a mismatch of expectations and abilities without adequate supports." It's characterised by pervasive, long-term exhaustion (typically three months or more), loss of function, and reduced tolerance to stimulus.
In 2023, Autism CRC in Australia surveyed 141 autistic adults, who strongly agreed with a published definition of it. They also flagged something that matters a lot: autistic burnout is often misdiagnosed as depression, anxiety, bipolar disorder or borderline personality disorder.
What it actually feels like
The research language is tidy. The real thing isn't.
The exhaustion isn't sleepy-tired. It's a flat-battery feeling that sleep doesn't touch. You wake up already spent.
Losing skills is the scary part. Stuff you've done for decades stops working. Making a phone call. Answering a simple email. Going to the grocery store. Holding a conversation without your brain going white. For someone who could run a room, that one messed with my head. I kept thinking I was getting dumber.
Lower tolerance means the world gets louder. Sounds, lights, textures, crowds, people needing things from you. What used to be background becomes an assault. Your fuse gets shorter, and for me that's a dangerous thing, because my fuse was never long. The robplosions didn't come out of nowhere.
Add the withdrawal. You pull back from everyone because you can't afford the energy. Autism CRC's participants described that need to withdraw, and to avoid environments that aren't built for autistic people.
What causes it
The researchers point at a pile-up. Years of stress. Expectations that don't match what you can do. No support, or not enough.
Masking is a big part of that pile. That's the constant effort to look and act non-autistic: forcing eye contact, rehearsing conversations, sitting through noise you can't stand, smiling through all of it. You can do it for a long time. I did it for about 50 years. It costs something every day, and the bill comes due all at once. I wrote about what masking is and, separately, how masking broke me.
Then there's life. A big change, a loss, a pandemic that flips every routine upside down. Something tips it.
Is it just burnout? Is it depression?
Not quite either, though they overlap.
Regular burnout, the kind people get from their job, comes from workplace stress. The Embrace Autism comparison lays it out: occupational burnout stays mostly tied to work, while autistic burnout hits every part of your life, and comes with the skill loss and the sensory overload.
Depression is trickier. They can look similar, and you can have both at the same time. Depression has been part of my life, so I know that ground. The Raymaker study concluded autistic burnout appears to be a distinct thing. I go further into it in burnout or depression? How I learned the difference.
If you're not sure which you're in, a doctor or psychologist who understands autism is worth finding. Misreading one for the other can mean the wrong help.
What helps, according to the people living it
There's no pill for this. What helps is mostly taking load off.
Embrace Autism lists cutting down on masking, getting accommodations in your environment, and reducing sensory input. Autistic adults in the research talk about time and rest, support from other autistic people, flexible work, and permission to be alone without having to explain it.
It also takes longer than anyone wants. The definition says three months or more for a reason. I've got a whole post on how long autistic burnout lasts.
For me, pushing through never worked. Pushing through is what got me there.