Corrected entry: In the first film. Henry Bowers carves the letter H into Ben's stomach. In this film, Pennywise creates the illusion of carving a word into Ben's stomach. When the illusion is broken, Ben's stomach is visible and there is no H-shaped scar where Henry previously carved him up.
Phaneron
26th Sep 2019
Correction: The H shaped scar from Ben's childhood is there, it's very faint but it is.