People say things without thinking. That's just true — most of the time nobody is sitting there carefully calculating the impact of every word before it leaves their mouth. Comments get made, jokes get thrown out, observations get voiced, and the person saying them has usually forgotten about it thirty seconds later.
The person on the receiving end often hasn't.
The thing about "small" comments
What makes a comment feel small to the person saying it is usually the same thing that makes it land hard for the person hearing it — the casualness of it. Something said seriously, with obvious intent, you can process as an attack. You know what it is. But something said as a throwaway, almost as an aside, with no apparent weight behind it — that one sits differently. It gets in under the radar. You find yourself thinking about it hours later wondering why it's still there.
When it's about something you're vulnerable about
A comment about something you're genuinely uncertain about — your abilities, your mental health, the way you come across to people — hits differently to a comment about something you're secure in. The ones that do real damage tend to land exactly on the places that already had some doubt in them. They don't create the insecurity, they just confirm it. Which is arguably worse, because it feels like evidence rather than an opinion.
The accumulation problem
One small comment is usually survivable. A pattern of them — from the same person, or across different people, or spread across a long period — accumulates into something that's harder to shake. Each one might be dismissible on its own. Together they start to feel like a consensus. Like maybe everyone thinks this and most of them are just not saying it.
That's usually not true. But it's where an autistic brain in particular tends to go, because we're often already doing a lot of work to figure out what people actually think of us — and when something confirms a fear, it gets weighted heavily.
What to do with it
Honestly, I don't have a clean answer. The things that help me are writing about it (which is partly what this is), talking to someone who actually knows me, and trying to remember that a throwaway comment tells you a lot more about where someone's head was in that moment than it does about anything true or permanent.
It doesn't always work. Some comments just lodge and stay for a while regardless. But naming what's happening — acknowledging that something small landed hard and that's allowed, without having to justify why or prove it was "bad enough" to matter — that part helps. You don't need to have been obviously wronged for something to have hurt you. Small things can do real damage. That's just true.