I'm in agreement with @MysteryChicken . It looks exactly like a squamous cancer.
But soak her in warm Epsom salts. If the crust dissolves and falls away, it's something else. Squamous cancers won't dissolve or heal. No, there's nothing you can do to treat them.
But soak her in warm Epsom salts. If the crust dissolves and falls away, it's something else. Squamous cancers won't dissolve or heal. No, there's nothing you can do to treat them.