Milk Thistle for kids

My 9 year old step daughter currently has a skin condition(dry red bumps on upper arms)that we are treating with the three oil massage. We are on week two and her arms are looking a bit better. I was wondering if you suggested milk thistle or Christopher's Liver/Gallbladder formula for kids with skin problems? I'm thinking it maybe liver/hormonal related. By the way I am in the School of Natural Healing and am doing the Herbalist course now and just wanted to say that I very much enjoyed your book and lectures.

Thanks
Travis