Bleed

From Resident Evil - Wiki on Neoseeker

Bleeding makes your HP decrease slowly each time you walk. It will also reduce your speed (you can't walk), but the effect is temporary. You can heal it with a Renostat. The top bleeders are the Leech Man, the Hunter, the Cerberus Dog and of course, the Zombie. While in Bleed status, your character will leave a trail of blood behind them when they walk.