Bindi Irwin has courageously shared details of her battle with an invisible illness in a new Instagram post aimed at raising awareness for endometriosis. "In the last three years, I've had over 50 endometriosis lesions cut out of my body," Irwin's caption began. "A chocolate cyst that was adhering my ovary to my side was removed. An appendectomy and a hernia repair. I've felt indescribable, inescapable pain. Trying to keep my invisible illness to myself after being told by doctors it was just 'part of being a woman.