Regardless of what condition you have, there is a basic operative principle. If you are emotionally healthy and comfortable in your own skin, then this will translate non-verbally to those around you.
I don’t think that everyone who notices your condition is necessarily being harshly judgemental or something like that.
They are just noticing something that’s out of the ordinary. It would probably make you yourself feel better and less awkward to acknowledge this verbally in whichever way you deem appropriate and then just continue on with whatever else is going on.
What I find really refreshing and interesting is the total honesty of young children. When they come upon someone with a noticeable difference ( missing limb, shaking, etc.) they will frequently ask the person directly. Why do you____________? ( have shaky hands, only one arm, etc.) and most people just simply explain because they realize that the child is just being honest and straightforward about something they find concerning to them but thus far out of their realm of experience. Most people realize that the child doesn’t have a negative intent but far more likely a sympathetic one.
Well, adults have been “trained out of” saying something to another and there is much more opportunity for misunderstanding. If they are a normal type of person, chances are most likely that they are more concerned than they are harshly judgmental.
For all they know, this could be a signal that the shaking person may need imminent help or it could be a prelude to a seizure or whatever.
If you BRIEFLY acknowledge their noticing it and reassuring them this is a normal part of your everyday life, that should be all that’s necessary to change the subject and move on to whatever the transaction at hand happens to be.
Of course if you encounter the extremely rare jackass for whom this does not suffice, you can then tear them a new one verbally with relish knowing that they really deserve it for being a shallow prejudiced nitwit.
But I honestly think that will be the exception. Most people are decent at heart. And strictly speaking you certainly don’t owe them any explanation, but it just serves to mitigate concerns and put everyone more at ease, including you.
I’m not recommending this for every stranger you pass in the mall or something, but just for those such as receptionists, cashiers, salespeople etc. with whom you have brief but necessary interactions with on an everyday basis.
You needn’t feel humiliated as you’ve done nothing wrong and this is in no way your fault. It’s unfortunate that you do, but perhaps by just dealing straightforward with others about it in a “matter-of-fact” type of manner, you’ll be able to change some of the awkwardness. You can’t prevent people from noticing but you do have the power to keep it from becoming a much bigger deal than it actually is.
It is what it is. No more. No less. Accept it, move on to something else, and give others the opportunity to do the same with a few gracious words which assume the best about their intentions rather than the worst. You’ll be surprised at how simply that can be done. Assume kindness and concern on the part of others until or unless they have said or done anything to indicate the opposite.