It looks like black dust. The best way to control head lice, is to check hair at least every week Early detection can find head lice before they have a chance to breed Head lice infection is a whole community problem, not just a school problem. The NHS Trust's and the Education Services advice is that children with head lice do not need to be excluded from school, but that treatment should be commenced as soon as possible. Head lice checks in schools should not be carried out. They have been found to be ineffective and give people a false sense of security.
Head lice are easier to detect on wet hair.
The only reliable way of detecting the early stages of a current head lice infection is by Detection Combing. Everyone should Detection Comb at least weekly. This is the only way to find head lice at an early stage. It is not enough to only check for head lice during normal hair washing. If you are to detect the early stages of head lice infection, you must follow the detection steps below.