The most obvious sign is a very itchy scalp, caused by the bites where the head lice suck blood. If you suspect lice infestation in your child, you should look closely and inspect the hair roots close to the scalp. A fine-toothed nit comb can be very helpful if you want to clarify whether there are lice or not. The comb helps you discover nits, which often might be mistaken for dandruff: whitish, shimmering nits are empty shrouds from which lice have already come out, while brownish-grey nits are in their development phase. Sometimes it is easier to see the bite marks on the scalp than the lice themselves. The bite marks may appear as small red pinpoints or raised dots of inflammation.