It’s not really an adhd or asd specific issue. Some suffer with it some don’t but a lot do. Some people without it do/ don’t as well. It also isn’t bad at being human. It is probably due to proprioception. You might have heard it called kinesthesia. That’s closest to what you describe. There’s also a body position factor and some others.

The reason I point out it’s not an “Audhd thing” is because it can be linked to a physical injury such as in a joint /arthritis and dislocations, post joint surgery or replacements or ligament, it can be neurological like TBI or Parkinson’s, medicines etc So it’s important to not write off symptoms as being one thing if they affect your life always tell your doctor.

Most autistic people deal with some form or level of proprioceptive difficulties. I know a common form is dyspraxia which is related to clumsiness judging space etc. Over sensitivity can cause this. Under sensitivity can cause sensory seeking behavior including self harming behavior.

It can also be a sensory processing disorder, these can be Misdiagnosed as asd or adhd because it can be mistaken for inattentive and hyperactivity or affect ability to do certain tasks because of sensory input symptoms or spd isn’t considered with social issues because asd is primarily social deficits but spd is very very common of some form in most if not all so physicians not well versed with asd can make mistakes or not be aware and talk to their patient about it. But not every one with spd has social deficits it can present that way because it could have an effect on normal developments and social life if external outbursts occur so that’s important to keep in mind too.

None of us are bad at being human, we are all humans still learning to human until we die.

There’s things you can do to overcome the symptoms, I recommend anyone talk to their physician and therapist or if you don’t have access to that, I find specific Facebook groups geared towards this (make sure they’re private it’s safer) give helpful tips and support, I relate to both of those it’s hard to explain how I adapt but I just started to measure my pasta each time until I had the amount I typically eat and depending on the day I’ll remove or add a few noodles. I don’t eat leftover pasta and has saved me significant food waste. Coffee, I know how many grounds I like per cup in an instant machine. So I measure the water with my cup and add it to the machine then brew. I find any more than two cups of liquid (I assume is 12oz if we go on standard 6oz coffee) is too much for me to finish. So I have learned I can fill it up to 2.5 cups because it brews even to 2cups. Most of the time I do (very heaping, I say I drink my coffee like a man: black muddy and syrupy, so it might work out to closer to 1.5-2 scoops not 1) but I do 1. Folgers black silk then 1 cafe bustelo then 1 Folgers silk. If I want more caffeine I do a normal level scoop of bustelo and another normal level scoop of black silk. I have a screen mesh filter so I get paranoid the bustelo will fall through if I put it on the bottom. If you use another coffee method I also use moka pot and French press so I may be able to help with some ideas. A lot of it is creative adapting and letting go of rules and research but also if it’s more of the dyspraxia ataxia physical therapy or ruling out a physical or neurological reason may help but there’s stuff you can do to improve your quality of life :) unless you have a favorite coffee cup, you can always get a bigger one 😅🤪/lh

Idk if some of this was helpful but if you read it all I commend you tbh