Why is the birthmark red in story the birthmark?

In Nathaniel Hawthorne's "The Birthmark," the red birthmark on Georgiana's cheek symbolizes human imperfection and the inherent flaws of nature. It represents both her mortality and the struggle between striving for perfection and accepting the natural state of being. The mark becomes a focal point for her husband Aylmer's obsession with perfection, ultimately highlighting the dangers of attempting to eliminate flaws at the expense of humanity.