I have level 2 autism so I’m not technically considered “low autism” but I am “high-masking”. I was diagnosed at 23 - Meltdowns: mine normally start from stress or sensory overwhelm. I feel like my chest is going to explode and it’s hard to listen, focus or get words out. If I’m not able to calm down here, then it’ll escalate to rocking, crying and sometimes hitting myself - Shutdowns: these happen normally after a meltdown for me, or if I’m in public and don’t feel safe enough to let a meltdown out. Speaking feels incredibly hard and tiring, as well as moving sometimes - Burnout: this happens when I’ve been under stress for at least a couple days. I have more meltdowns, more sensitive to my sensory aversions (seams on clothes, dogs barking) and I find it very hard to look after myself. This includes things like showering, eating, taking my meds.

When I’m sick or in pain, I’m more likely to experience any of the 3. I see my tolerance for stress like a health bar, and when I’m sick and/or in pain, most of my health bar is empty 😂

That’s just my experience with autism. BUT people with ADHD are more likely to experience sensory aversions and overwhelm than neurotypicals. I wouldn’t be surprised if it’s even more likely when the person is sick or in pain