Blood under one's toe nail
Q: My toe was hit by a heavy thing falling down and it caused some blood to emerge within the nail. I heard that blood on the surface was pure and I washed the toe and did not think about it. Weeks later I thought about this again when I saw the dried up blood in my nail (Note: some of the blood was within my nail so I cannot remove it, otherwise I would need to remove my nail!) and I don’t know if that counts as pure or impure.