It’s mostly neurological pain being transformed into the form of itching. Sometimes i just wish it would hurt instead of itch, because there’s no certain spot on where it’s itchy.
Something could bite you, and your body didn’t realize it yet so you won’t feel it until later.
It could feel like you’ve been bitten, and are being bit, but you aren’t actually getting bit by a bug, i’ve watched a million times looking for a bug, there’s no bugs even when i watch the spot all of a sudden say it’s bit and no bug.