It is not necessary to treat the hair just because you were exposed to lice unless you see live lice or nits. If you are spending time around someone who has a head lice infestation (friend, family member, co-worker), you may consider using Licefreee Everyday! Shampoo. Licefreee Everyday! is a homeopathic head lice shampoo containing naturally occurring ingredients that create an environment where head lice do not like to live.