Can you come back from the ick? Sometimes — and the difference is predictable
For some people the ick is permanent and instant; for others it fades in and out for weeks. Which one you get says more about how you process attraction than about the person who triggered it.

Everyone who has had the ick asks the same question afterward: was that real, or did I just throw away something good over the way he held a menu?
The honest answer is that it depends on which kind of ick you get. And people are surprisingly consistent about which kind that is.
Two different events wearing the same name
The switch. One moment, fully reversible in principle, completely irreversible in practice. You can name the exact second. The lighting, what they said, where you were sitting. Attraction was there, and then it was gone, and it has never once come back for anyone you've felt this about.
The fade. No single moment. A slow accumulation of small things, none of them disqualifying, that at some point crosses a line you couldn't have drawn in advance. Ask when it turned and you genuinely don't know.
These feel like the same phenomenon because they produce the same outcome. They aren't. And the answer to "can I come back from this" is different for each.
The switch almost never reverses
If you're a switch person, you already know this, because your track record is unambiguous. Every time it has happened, it stayed happened.
That's worth taking seriously rather than fighting. What the switch usually is: a moment where a specific detail contradicted a story you were running about this person. You had them filed one way, they did something that didn't fit, and the file closed. The detail is rarely the actual reason — it's the trigger that revealed the story was thin.
Which is why "but that's such a small thing" arguments don't work on you. The small thing was never the point.
The fade sometimes does
If yours builds slowly, the situation is genuinely more open, because a fade is often about context rather than the person.
Stress, exhaustion, a bad month at work, or simply too much proximity too fast can all produce the drifting-away feeling, and those things change. People who fade will sometimes report the feeling receding after a break, a good week, or a real conversation — which is nearly unheard of for switch people.
That doesn't make the fade less real. It makes it worth waiting out before you decide, because with a fade you are reading a moving average, not a single data point.
The other variable: where it hits you
There's a second axis that people don't notice about themselves.
Some people's ick fires in public. You're watching how they are with a waiter, with your friends, in a room — and what turns you off is social, about how they occupy space around other people.
Others only get it in private. Something small in the quiet, one-on-one, that nobody else would have witnessed.
This matters for the "was it real" question. A public ick is usually information about how this person treats people, which is worth keeping. A private ick is more often about fit between the two of you specifically — less a verdict on them, more a read on the pairing.
What it actually tells you
The ick has a bad reputation as shallowness, and sometimes it is. But dismissing it entirely is also wrong, because it's frequently a slow realization arriving faster than your reasoning can produce it.
A useful way to sort it:
Would you still feel this if you were well-rested and having a good month? If no, it's probably a fade, and probably context.
Could you describe the one thing, exactly? Switch people can, every time. If you can, the next question is what story it contradicted — because that's the real content.
Was anybody else there? Public trigger, more likely information about them. Private trigger, more likely information about fit.
None of that tells you what to do. It tells you what you're looking at, which is a better starting point than either "trust your gut" or "you're being ridiculous."
The part nobody likes
If you're a switch person with a long history of switches, the pattern is worth a look on its own.
There's a version of this where the ick is genuine information, arriving fast, and you should keep listening to it. There's another version where it reliably appears at the exact moment someone becomes real rather than idealized — where the trigger is always the first evidence that this person is an ordinary human with unflattering angles.
Both feel identical from inside. The only way to tell them apart is the track record: if it has happened with everyone, at roughly the same stage, the common factor isn't the menu.