There are three common things you might find in the hair when checking for lice:
Live lice – they are small, flat, wingless and fast-moving. They’re about the size of a sesame seed, pale gray or brown in color, and they don’t like light. If you spot something moving, that’s a louse.
Eggs (nits) – they are tiny and oval-shaped, glued tightly to the hair shaft close to the scalp. They look white or yellowish. Unlike dandruff, they don’t brush off.
Dandruff – flakes loose when you touch them, nits don’t. That’s the easiest way to tell the difference.
Top tip: Found something stuck to the hair that won’t flick off? That’s more likely to be an egg than dandruff. It’s worth doing a full comb-through to double check.