What should be done if lice do not disappear? - briefly
Consult a healthcare professional for prescription‑strength pediculicide and follow a repeat‑treatment schedule, while washing all bedding, clothing, and personal items in hot water and vacuuming the environment. If infestation persists, seek specialist evaluation for resistant lice and alternative therapies.
What should be done if lice do not disappear? - in detail
If an infestation persists after initial treatment, follow these steps:
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Verify that the product was applied correctly: read the label, use the recommended amount, and allow the full exposure time before rinsing. Inadequate coverage or premature washing often leaves viable lice.
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Perform a second treatment within 7–10 days. Most over‑the‑counter shampoos and lotions are designed for a repeat application to kill newly hatched nymphs that survived the first round.
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Combine chemical treatment with a mechanical method. Use a fine‑toothed nit comb on damp hair, working from the scalp outward. Repeat combing every 2–3 days for at least two weeks, removing any live insects or eggs.
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Wash all personal items that may harbor lice: pillowcases, towels, hats, hair accessories, and clothing worn within the previous 48 hours. Use hot water (≥130 °F/54 °C) and high‑heat drying, or seal items in a plastic bag for two weeks if washing is not possible.
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Treat the household environment. Vacuum carpets, upholstery, and car seats thoroughly. Discard or isolate items that cannot be laundered.
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Consider prescription‑strength options if over‑the‑counter measures fail. Oral ivermectin or topical spinosad are approved for resistant cases; obtain them from a healthcare professional.
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Seek medical advice if symptoms worsen, if there is persistent itching despite treatment, or if secondary skin infections develop. A clinician can confirm the diagnosis, rule out misidentification, and prescribe appropriate therapy.
By confirming correct usage, repeating treatment, employing thorough combing, sanitizing personal and household items, and escalating to prescription medication when necessary, the infestation can be eliminated even after initial attempts have not succeeded.