What Is The Treatment For Lichen Planus Disease Of A 9 Years Old?

my daughter has lichen plunus desease and has had it for to years now,i keep getting told to wait and see if it has spreads it has gone from the nails to the face and now to the body, when she was at school she had a head injury that set off a mayjor ear inffection and she was hostpitalised for it, i was told her ear infection was so bad it could of lead to brain damage, she never had this skin problem why did she come out with it im in newzealand and there is no help for her can you help me please the doctors want give her sterior cream cause of her age, so what can i do for her she is a 9 year old