How to find out if there are lice? - briefly
Examine the scalp and hair for tiny, moving insects about the size of sesame seeds, particularly near the neck and behind the ears. Look for small white nits firmly attached to hair shafts that do not slide off when brushed.
How to find out if there are lice? - in detail
Detecting a lice infestation requires systematic observation and appropriate tools.
A thorough visual examination of the scalp should begin at the hairline and progress toward the nape. Light, magnified inspection reveals adult insects, which appear as grayish‑brown bodies about the size of a sesame seed.
A fine‑tooth comb, preferably a lice‑comb with 0.2‑mm spacing, removes live insects and dislodges attached eggs. Comb the hair in sections, wiping the comb after each pass to prevent redistribution.
Nits (lice eggs) are identified by their oval shape, white or yellowish color, and firm attachment to the hair shaft within 1 cm of the scalp. The presence of several nits in close proximity strongly indicates an active infestation.
Secondary signs include persistent itching, redness, and small red bumps caused by bites. While these symptoms are not exclusive to lice, their combination with visual evidence reinforces the diagnosis.
Additional verification methods:
- Wet‑comb technique: Apply a conditioner to wet hair, then comb with a lice‑comb. The conditioner immobilizes insects, facilitating detection.
- Adhesive tape test: Press clear adhesive tape to the scalp, then examine the tape under magnification for captured insects or nits.
- Professional inspection: Dermatologists or trained healthcare providers use dermatoscopes to confirm findings and rule out other scalp conditions.
Inspection of personal items (hats, scarves, bedding) for detached nits or live insects helps assess the extent of spread.
Prompt confirmation enables immediate treatment and prevents further transmission.