My niece is just 9 months old and it seems she got head lice. What can we do to remove it completely and prevent its re-occurance? Using comb out method may not helpful considering her age. And we r a bit conscious of using any medicated shampoo as we don't know what level of negative impact they may cause for her. So we need some advice so we can either buy something for its treatment or visit a dermatologist. Thanks much in advance.