You’ve got a cut and are bleeding like crazy
Think about: Needing stitches.
Even small cuts can produce what appears to be a lot of blood. “It’s hard for someone who’s not a doctor to know which wounds need stitches and which don’t,” explain emergency medicine physician Sean McGrann. That said, an especially deep cut could result in damaged nerves or tendons, and, of course, heavy bleeding that won’t stop is always an emergency.