Facts of Lice

Signs & Symptoms

1. Itching… Sometimes. Although itching is the most obvious sign of lice; NOT everyone actually itches! Some people who have lice may not itch at all. During the life cycle of a louse; nymphs (baby bugs that hatch from the nit/egg) and adult lice deposit their feces on the scalp. Some people are allergic to the feces being scratched into their lice bites if they have open sores. (While head lice do not spread blood born pathogens, infection or disease, the scratching of the feces into the lice bites and open sores, can at times cause an infection).

More commonly, people are allergic to the saliva from the lice bites.This can cause itching… however, not everyone is allergic to the lice bites! When the louse feeds on the scalp it injects an anticoagulant to prevent the blood it is feeding on from dotting.The itching symptom is caused by the allergic reaction to this anticoagulant contained in the saliva of head lice when they bite our scalp to feed on our blood. Not everyone is allergic to the lice saliva to the same degree. That is why some people will not have any itching symptoms at all. So that means not everyone will itch when infested with human head lice.
We always remind clients to do their weekly maintenance checks which we teach at their follow-up appointment.

2. Rash on back of neck or behind ears.

3. Scabs on scalp.

4. Swollen lymph nodes.

5. And sometimes… there is NO sign at ALL!!!