Step 4
You are looking for a living, moving louse. They range in size from a full stop to a sesame seed depending on their age. When it first hatches, a young louse (known as a nymph) is transparent but after its first blood meal, it will darken to a greyish brown colour. Head lice live on, or very close to, the scalp and don’t wander far along the hair shaft unless encouraged to move to a new head.