Nerve Ending is a bizarre static enemy appearing in The Binding of Isaac: Rebirth. It essentially acts as a meat shield, and very rarely will shoot a single blood bullet.
They're completely weak, but they still can deal damage to the character if contacted. It often spawns with an "eye."
- This enemy may be a reference to the episode "Ren's Toothache" from the classic Nickelodeon cartoon The Ren & Stimpy Show.