Head Lice
What is it?
Head lice are small insects that live on the scalp and feed on blood. They do not spread disease and are not related to poor hygiene. They are common among school-aged children.
How is it spread?
Head lice spread mainly through direct head-to-head contact. Spread through shared personal items, such as hats or brushes, is less common.
When is it contagious?
Head lice are contagious as long as live lice are present. They do not survive more than 1–2 days away from the scalp.
How is it diagnosed and treated?
Diagnosis is made by finding live lice or viable nits close to the scalp. Treatment includes lice-killing products and careful nit combing. A second treatment is often needed 7–10 days later. Only individuals with live lice should be treated.
Should the child stay home?
No. According to CDPH guidelines, students should not be excluded from school for head lice or nits. The child may remain in class and be referred for treatment at the end of the day.
How can we limit the spread?
- Avoid head-to-head contact
- Do not share personal items (hats, brushes, headphones)
- Perform routine head checks at home
- Treat promptly if lice are found
- Encourage regular hand hygiene