Full Marks Head Lice Solution is a traditional treatment that works by causing lice to dehydrate and die. It can then be removed along with any eggs using the fine metal toothed Full Marks Removal Comb provided. If a family member needs treatment, you should also check other members of your family for live lice with a specially designed Full Marks Detector Comb and treat if necessary. This solution eliminates eggs and has a low odour. It's a quick and easy treatment that doesn't use traditional pesticides.