Scrooge have distanced his self from people even though he look scary because of his eyes. Scrooge fight the demon in him at the end of the story to change his life. When Scrooge was cold-heart he believe that the ghost was telling him to change. When Scrooge was in the store and two man came and he was acting mean because he have never been cared about.
Scrooge physically change because when the fourth ghost came and show him flat