Lice eggs go with daily wet-combing plus a proven lice treatment, then repeat or recheck in 7–9 days to catch new hatchlings.
Finding tiny shells glued to hair near the scalp can make any home feel on edge. The goal is simple: clear every nit that can hatch, stop new ones from being laid, and break the cycle fast. This guide gives you a step-by-step plan backed by medical sources, clear product facts, and a practical cleaning routine.
Get Louse Eggs Out: Step-By-Step Wet Combing
Wet combing is the backbone of any plan. It removes eggs by hand and lets you check progress in real time. You will need a metal nit comb with fine, rigid teeth; hair clips; a wide-tooth comb; a spray bottle with water; and plain conditioner.
Set Up
Seat the person and detangle the hair with the wide-tooth comb. Dampen the hair and work in a palm of conditioner so strands stay slick. Divide the hair into small sections with clips.
Comb Technique
Set the comb flat at the scalp and pull to the ends. Wipe on white tissue after each pass. Work the nape and behind the ears. Clear every section.
Session Rhythm
Do a full pass daily for week one, then every other day in week two. Keep going until you reach three clean sessions in a row with no live bugs and no fresh nits within a quarter inch of the scalp.
Treatments And What They Do To Eggs
Medicines speed the job by killing live lice and, in some cases, eggs. Not every product affects nits, so timing matters. Always follow the label for age limits and safety steps. The summary below shows how common options act on eggs and when a repeat is needed.
| Treatment | Kills Live Lice? | Affects Eggs? |
|---|---|---|
| Permethrin 1% lotion/shampoo | Yes | Does not kill nits; repeat in 7–9 days |
| Pyrethrins + piperonyl butoxide | Yes | Does not kill nits; repeat in 7–9 days |
| Spinosad 0.9% lotion | Yes | Ovicidal; nit combing often not needed |
| Ivermectin 0.5% lotion | Yes | Not ovicidal; prevents survival of hatchlings; single use |
| Benzyl alcohol 5% lotion | Yes | Not ovicidal; repeat in 7 days |
| Malathion 0.5% lotion | Yes | Partly ovicidal; repeat if live lice remain at 7–9 days |
Public health guidance backs this timing. If a product kills both bugs and eggs, a second round may not be needed; if it does not kill eggs, plan a second round about a week later. Some labels even note that nit combing can be skipped with certain formulas, though many families still prefer to comb since it speeds clearance and lowers the risk of mix-ups.
Pick The Right Product For Your Situation
Start Points
Many start with a store product. Permethrin 1% and pyrethrins kill live lice but leave many eggs, so a repeat is needed. If local results are poor, ask a clinician about a prescription.
Prescription Choices
Spinosad 0.9% kills lice and eggs and often works with one round. Ivermectin 0.5% kills lice and keeps hatchlings from living long enough to breed, so one 10-minute round can be enough. Benzyl alcohol 5% kills lice but not eggs, so treat again at day 7. Malathion 0.5% kills lice and some eggs; it can sting and is flammable while wet, so skip heat tools until fully dry.
Age And Safety Notes
Most nonprescription products are cleared for kids over 2 months or older; several prescription lotions are cleared for 6 months and up, with label differences by brand. If the person is pregnant, nursing, or has skin disease, ask a clinician or pharmacist which option fits best.
How To Check Hair So Eggs Don’t Sneak Back
Nits usually sit within a quarter inch of the scalp. Farther out often means old, empty shells stuck to the shaft. During checks, aim for bright light and slow, systematic passes. If you still see live bugs after two well-timed treatments, switch classes: move from a pyrethrin or permethrin base to a different type such as spinosad, ivermectin lotion, or malathion with your clinician’s guidance.
Clean Smarter, Not Harder
Head lice live on people, not on couches. Off the head, they lose water and die in one to two days. Nits need body heat to hatch. That means your cleaning list can stay short and focused.
What To Wash
Run items that touched the head in the two days before treatment through hot water at 130°F (54°C) and a hot dryer cycle. This includes pillowcases, hats, scarves, and hoodies. Soak combs, clips, and brushes in hot water at the same temperature for 5–10 minutes.
What To Bag Or Skip
Items that can’t be washed can be sealed in a plastic bag for two days, or set aside for that time. Big spring-cleaning projects and fumigant sprays add cost without proof of extra benefit.
You can read clear step-by-step guidance on lice care and retreatment timing from the CDC treatment page. Practical wet-combing tips for families are listed on the NHS head lice and nits page.
Common Mistakes That Keep Eggs Around
Stopping Combing Too Soon
Eggs that were laid the day before treatment can hatch later. Keep the combing schedule for at least two weeks, even when things look clear.
Skipping The Second Round
When using a product that leaves eggs intact, a repeat at day 7–9 is the safety net. Missing that window is a frequent reason for a rebound.
Using Heat Devices With Malathion
Malathion lotion is flammable when wet. Keep away from hair dryers and irons until the hair is rinsed and fully dry.
Too Much Housework
Hours spent spraying carpets or fogging rooms do not help and add fumes. Focus on heads, not rooms.
Step-By-Step Retreatment And Check Schedule
Use this simple plan to match your product to the right follow-up. Keep it on the fridge so everyone stays on the same page.
| Day | Action | Why It Matters |
|---|---|---|
| Day 0 | Treat as labeled; full wet-comb pass | Knocks down live lice; pulls off many eggs |
| Day 1–6 | Daily wet-combing; quick head checks | Catches hatchlings before they breed |
| Day 7–9 | Repeat only if your product does not affect eggs or if live lice are seen | Lines up with the egg hatch window |
| Day 10–14 | Combing every other day | Verifies the cycle is broken |
| Day 17 | Final check of all heads in the home | Prevents a missed case from restarting the cycle |
How To Tell An Egg From Lint Or Dandruff
Real nits are oval, stick firmly, and are tough to slide. Lint and skin flakes move easily when nudged. A nit close to the scalp often looks tan or brown; empty shells look white. A magnifying glass or phone macro lens can help during checks.
When A Different Plan Makes Sense
See a clinician if the person is under 6 months old, has open skin on the scalp, has a known allergy to any product, or has repeated treatment failures. A change in drug class, a check for a different cause of itch, or a team combing session in clinic can end the struggle.
Why This Plan Works
Lice breed close to the scalp and glue eggs to hair. Most nonprescription products do not kill eggs, so a scheduled repeat plus wet-combing clears what the first round missed. Some prescription lotions kill eggs or stop hatchlings from living long enough to lay more eggs. Add light, steady checks, and you close the loop without excess cleaning.
Put It All Together
Clear a block of time for the first session. Treat based on the label you chose. Comb every strand, wipe the comb often, and repeat passes until the tissue stays clean. Keep the schedule for two weeks. Wash the few head-touch items from the two days before treatment, soak brushes, and move on with your day. With steady work, the last nit goes and stays gone.