How did Johnny's appearance change after the accident in Johnny Tremain?

After the accident in "Johnny Tremain," Johnny's appearance changes significantly due to the severe burn on his hand. The injury leaves his hand disfigured and unusable for his craft as a silversmith, altering not only his physical appearance but also his identity and self-worth. The loss of his former beauty and skill becomes a pivotal point in his character development, leading him to reevaluate his place in the world and his personal ambitions.