Oh, that is awful. My grandaughter did humaworm, and was successful. If the fibers are coming out, I would say it is doing it's job. Swimming, soaking in a large clean body of water is curative. I've had pretty good luck with the chewable vitamin C. Would give the child lots of C in between humaworm rounds. All the immune boosting stuff you can do the better. I even grow much of my own vegetable and fruit. Even if you can't grow a whole garden a couple of fresh pots of greens and a tomato plant or two will make a difference. My heart goes out to you.