Itching on the scalp, especially behind the ears or at the nape of the neck
A tickling or crawling feeling on the scalp
Small red bumps or sores from scratching
Seeing live lice moving in the hair
Finding nits, which are tiny oval eggs attached firmly to hair shafts near the scalp
Nits that do not brush off easily
Irritability or trouble sleeping
Checking with a fine-tooth lice comb under bright light
Looking closely at the scalp and hair roots for lice or nits
Noticing lice or nits on eyebrows, eyelashes, or clothing seams in severe cases