Why should lice be washed? - briefly
Washing eliminates adult lice and their eggs, stopping the infestation and associated itching. It also reduces the risk of spreading parasites to others.
Why should lice be washed? - in detail
Washing lice‑infested hair eliminates adult insects and their eggs, directly reducing the parasite population. Hot water and detergent dissolve the protective coating of nits, making them easier to detach from shafts. Removing the insects lowers the risk of transmission to other individuals because lice spread through direct head‑to‑head contact.
A clean scalp diminishes irritation caused by bites; fewer insects mean less scratching, which prevents secondary bacterial infections. Regular laundering of clothing, bedding, and personal items at temperatures above 60 °C destroys any detached lice or eggs that might re‑infest the host.
Mechanical methods complement chemical treatment. Comb‑through with a fine‑toothed lice comb after washing removes residual nits that survived the shampoo. Repeating this process every 2–3 days for a week ensures that newly hatched nits are captured before they mature.
Environmental control is essential. Washing hats, scarves, and hair accessories removes concealed insects, while vacuuming upholstery and carpets reduces the chance of accidental transfer.
In summary, thorough washing of the scalp and associated garments interrupts the lice life cycle, curtails spread, alleviates symptoms, and safeguards against complications.