How Do You Treat Lice in Curly or Coily Hair?

Q: Why do lice keep coming back in my daughter's curly hair?

Almost always missed nits near the scalp and a skipped second treatment. Smaller sections, more slip, and the day 7 repeat fix it.

By Joanna Shu, founder of Cartwheel. Updated November 12, 2026. Cartwheel makes Nit Happens, and that is disclosed wherever it appears below.

Short answer: Lice treatments work the same way on curly and coily hair as on straight hair; what changes is the combing. Detangle first with a lot of conditioner and a wide tooth comb, work in small sections (an inch wide, not a handful), use a metal lice comb from the scalp out in short strokes, and plan for 60 to 90 minutes instead of 45. Pesticide-free gel treatments such as Nit Happens (ours) have an advantage here: the gel is slip, so the comb moves through tight curls instead of catching, and the treatment does not depend on chemistry that resistant lice ignore.

One more thing parents of Black children are often told: coily hair does get lice. It is less common in the United States, because the claws of American lice are adapted to rounder hair shafts, but less common is not never, and a case that is missed because "we don't get lice" is the one that spreads.

Why curly and coily hair makes lice harder to find, not harder to treat

Lice live on the scalp and lay eggs on the hair within a quarter inch of it. On straight hair, a lice comb glides from root to tip and anything attached comes with it. On curly hair (type 3) and coily hair (type 4) the comb catches on the curl pattern, the hair tangles when wet, and nits hide in the volume near the scalp. Parents give up early, miss nits, and the infestation comes back. The fix is technique and time, not a stronger product.

The method, step by step

Treat before you comb. Apply the treatment to dry hair, section by section, all the way to the scalp. On dense hair, use more product than you think; the scalp has to be covered, not just the surface of the hair.
Wait the label time, then add slip. If you are using a pesticide shampoo, rinse per the label and then load the hair with a cheap, thick conditioner. If you are using a gel such as Nit Happens, the gel is the slip; add a little water if it starts to drag.
Detangle first with a wide tooth comb or your fingers. Do not put a lice comb into tangled curls; it will pull and you will stop. Work from the ends up to the roots.
Section small. Clip the hair into 8 to 12 sections, then take one inch subsections. Twist or clip each finished subsection out of the way so you can see what is done.
Comb from the scalp outward in short strokes. Press the comb to the scalp, pull through 2 to 3 inches, wipe on a white paper towel, repeat. Angle the comb a different way on the second pass. Nits are at the root, so the first inch matters most.
Finish with the ends. Lice are at the scalp, but nits that were missed can be anywhere on long curls. One final pass from root to tip per section.
Repeat in 7 days. Whatever you missed hatches within a week; the second round catches it before it lays eggs. Nit Happens includes the second application in the box.

Products that help and products that hurt

Option	On curly or coily hair	Notes
Pesticide-free gel kit (Nit Happens, ours)	Good	The gel adds slip; kills lice and nits by coating and dehydrating them, so resistance is not an issue. Metal comb included. Ages 3 and up. Allow extra combing time.
Dimethicone lotion	Good	Silicone based, very slippery, no pesticide. Can be hard to wash out of dense hair; clarifying shampoo helps.
Permethrin or pyrethrin shampoo (Nix, RID)	Poor	About 98% of US lice resist them. The creme rinse formulas also leave curls stiff and tangled, which makes the comb out worse.
Ivermectin lotion (Sklice)	Fair	Works without combing on the label, but no comb means nits stay in the hair; most parents comb anyway.
Plastic lice combs	Avoid	Teeth spread on coily hair and let nits through. Use a long tooth metal comb.
Heavy oils and mayonnaise	Avoid as treatment	They add slip but there is no evidence they kill lice. Fine as conditioner for the comb out only.

Protective styles, products and washing

Hair with product buildup (gel, edge control, heavy butters) should be clarified before treatment so the treatment reaches the scalp. Treatments do not damage curl pattern or color, but repeated pesticide shampooing dries hair; one more reason to use a product that works the first time. If the hair is in braids, twists or extensions, see the braids, locs and extensions guide; some styles have to come out for a proper comb out.

Treating curls tonight? Nit Happens is pesticide-free, the gel gives the comb slip through tight curls, and it has an IRB approved clinical study behind it (89% lice free at day 15 counting everyone enrolled, 95.8% when two participants the investigators judged to be re-infestations are excluded). $34.99 per person, HSA and FSA eligible.

See the kit Buy at Walgreens Buy on Amazon

Questions parents ask

Can Black people or people with coily hair get lice?

Yes. It is less common in the United States because American head lice have claws adapted to rounder hair shafts, but infestations in coily and type 4 hair happen and are often found late because families were told it could not happen.

Do I need a special lice treatment for curly hair?

No. Any treatment that kills lice works on any hair type. You need a long tooth metal comb, a lot of slip (conditioner or a gel treatment), small sections, and more time.

How long does lice combing take on thick curly hair?

Plan on 60 to 90 minutes for the first comb out, about double a straight haired child. Break it into two sittings if you need to; the treatment keeps working while you rest.

Will lice treatment ruin my curls or my color?

A single treatment will not. Repeated pesticide shampoos dry the hair, and dimethicone can leave buildup. Deep condition afterward and clarify once the lice are gone.

Can I treat lice without taking out braids?

You can apply a treatment to the scalp with braids in, but you cannot comb nits out through braids, so the infestation usually returns. Most families take the style out for the comb out and rebraid a week later.

Why do lice keep coming back in my daughter's curly hair?

Almost always missed nits near the scalp, because the comb could not reach them through the curl, plus a skipped second treatment. Smaller sections, more slip, and the day 7 repeat fix it.

Related guides

Sources

American Academy of Pediatrics, Head Lice clinical report, Pediatrics 2022.
CDC, Head Lice: Epidemiology and Risk Factors (lower prevalence in African American children in the United States).
Gellatly KJ et al. J Med Entomol 2016 (98.3% knockdown resistance frequency in US head lice).
Villar and Rubio Rivera, H.A.L.T. clinical study, 2020, commissioned by Arbor Development; Cartwheel is the licensee. doi:10.5281/zenodo.23510395.