Head Lice

Head lice are tiny insects that live on the scalp and feed on human blood. They are common in school-age children but can affect anyone. Although they are unpleasant and inconvenient, they are not a sign of poor hygiene and do not mean a home is dirty. ^[1][2]

What are head lice?

Head lice are parasites adapted to live in human hair, especially near the scalp. They spread mainly through direct head-to-head contact, which is why they are common among children who play closely together. ^[1][2]

How do they spread?

Direct head-to-head contact is the main route. Shared hats, brushes, or bedding are discussed often, but routine transmission is much more strongly linked to direct contact. Lice do not fly or jump. ^[1][2]

Symptoms and diagnosis

The most common symptom is scalp itching, although not everyone itches right away. Irritation at the back of the neck or around the ears may also occur. Diagnosis is more reliable when a live louse is found rather than relying on dandruff-like material alone. Nits may be present, but seeing nits alone does not always confirm active infestation. ^[1][2]

How is treatment done?

Treatment usually combines an appropriate lice-targeted product with careful follow-up and checking of close contacts as advised. The exact approach depends on the product used and whether live lice are still seen after treatment. Home management often involves practical cleaning of frequently used items, but extreme or exhausting “whole-house” cleaning is often not the central solution. ^[1][2]

When should you see a doctor?

Medical advice is helpful if treatment seems to fail, if scalp infection develops from scratching, if there is uncertainty about diagnosis, or if infestation keeps returning. ^[1][2]

Approach at school and at home

Families often feel embarrassed, but head lice are common and manageable. Clear communication, practical treatment, and avoiding stigma are more useful than panic. ^[1][2]

Why does reinfestation happen?

Reinfestation may happen because of untreated close contacts, persistent exposure, incomplete treatment steps, or misinterpretation of what is still active infestation. ^[1][2]

Common myths at home

Head lice are not caused by dirt, they do not jump or fly, and shaving the head is not usually necessary. ^[1][2]

FAQ

Do head lice come from dirt?

No. Head lice are not a sign of poor hygiene. ^[1][2]

Do head lice jump or fly?

No. They crawl and spread mainly through direct head-to-head contact. ^[1][2]

Do nits alone prove diagnosis?

Not always. Finding a live louse is more reliable evidence of active infestation. ^[1][2]

Is shaving the hair necessary?

Usually no. Standard treatment approaches do not usually require shaving. ^[1][2]

When should a doctor be seen?

When diagnosis is unclear, treatment fails, or the scalp appears infected or repeatedly affected. ^[1][2]