Are you ever working really hard on something, maybe building repairs, or gardening, and perhaps you hit or scrape your hand, and it hurts, but you're too involved in what you're doing to really notice, so you keep going, and it hurts a little, but you figure it's just a bump and the pain will fade away.
But the pain doesn't fade away at all and now you have a moment, and it hurts, so you look down and your hand is like dripping blood?
Funnily enough something similar happened to me today!
I was working pretty intensely on my library's self check in machine, and I guess I hit or pinched my right pointer finger. I don't even particularly remember when. I just remember this expectation the small bruising pain would fade away. But after awhile it didn't fade, it maybe even hurt a bit worse. So I looked down and the whole bottom of my nail was all black.
There is no moral to this story. It's just me, six hours later, repeatedly thinking, "Ow, my finger hurts."