When a hemorrhoid from inside pushes outside or "prolapses," it can bleed, hurt, and itch. It may go back in on its own as the swelling goes down, or you can gently nudge it back. A blood clot that forms in a hemorrhoid just under the skin outside is a thrombosis. It might get hard and sore and could bleed if it breaks. If the clot goes away, it may leave behind a little piece of skin called a skin tag that can bother you.