How to find out if there are lice on the head? - briefly
Examine the hair and scalp using a fine‑tooth comb, searching for live insects, small white or yellow eggs attached close to the skin, or dark specks that indicate nits. If any of these signs are observed, verify by identifying the characteristic size and shape of lice.
How to find out if there are lice on the head? - in detail
Detecting a head‑lice infestation requires systematic visual and tactile examination. Begin by separating the hair from the scalp with a fine‑tooth comb, preferably a metal lice comb, and work in sections. Hold the hair taut and pull the comb from the roots toward the ends, wiping the teeth on a white paper towel after each pass. Repeat the process on the entire head, paying special attention to the nape, behind the ears, and the crown, where lice and their eggs are most commonly found.
Look for three primary indicators:
- Live insects: small, wingless, grayish‑brown bodies about 2–3 mm long, moving quickly when disturbed.
- Nits: oval, white or yellowish shells attached firmly to the hair shaft within ¼ inch of the scalp; they are often mistaken for dandruff but cannot be brushed away easily.
- Symptoms: persistent itching, irritation, or a sensation of movement on the scalp, usually caused by an allergic reaction to lice saliva.
If any of these signs are present, repeat the combing procedure after a 24‑hour interval to catch newly hatched lice that may have emerged from missed eggs. For increased accuracy, conduct the inspection in bright, natural light or use a magnifying glass. Document findings by photographing the combed material on a contrasting background; this helps differentiate nits from hair debris.
When no lice or nits are observed after two thorough examinations spaced a day apart, the likelihood of infestation is low. However, continue monitoring for at least two weeks, as eggs may hatch later than expected. Regular checks, especially after known exposure (e.g., school, camps), are the most reliable method for early detection and prevention of spread.