Not sure what that is. I had a rooster who had almost the same thing, on his comb, but he never seemed bothered by it. Hens would peck at it, but that's about it. As long as she is eating well and doesn't show signs of distress, im sure there is nothing to worry about. It kind of looks like a scab, but If it seems to spread to various areas on her face, she might have to what seems to be fowl pox.