Head lice are small insects that live on the scalp and lay eggs (nits) on the hair and make the scalp itchy. Head lice are common in children. Medicated treatments to kill lice and nits are available, at the chemist, however, there is resistance to over-the-counter insecticide shampoos and lotions. Another option is to apply a thick layer of conditioner and leave it for 30 mins then comb the hair with a nit comb. If you use conditioner, apply the product to dry hair. For shampoos, wet the hair, but use the least amount of water possible. This method can be used every second day until no live lice have been found for 10 days. Medicated insecticide treatment must involve two applications, seven days apart. Each time you need to use a lice treatment change the brand as this provides more effective treatment. There is no need to treat the whole family, unless they also have head lice.