My DD2 had headlice at 6 months thanks to DD1 getting them from kinder you can use all the products on the market (kp24, moov etc) from 6 months old so you will be able to use them. What I did with my 2 is used the moov foaming stuff in there hair washed it out 10 mins later then once out of the bath got conditioner and the nit comb and sat and combed and combed and combed! Then continued to comb every day then used the moov again 7 days later still combing every day getting all the eggs out - trust me those suckers lay heaps!