What is the best treatment for stubborn lice?

Author: Ms. Alize Mosciski  |  Last update: Thursday, April 24, 2025

There are several different products that can be applied to the scalp and hair to kill head lice, including:
  • dimeticone 4% lotion or lotion spray – applied and left for 8 hours (usually overnight)
  • dimeticone 4% spray gel – applied and left for 15 minutes.
  • mineral oil and dimeticone spray – applied and left for 15 minutes.

How do you get rid of stubborn head lice?

If wet combing has not worked or is not suitable, you could try a medicated lotion or spray. These kill head lice in all types of hair, and you can buy them from pharmacies, supermarkets or online. Head lice should die within a day. Some lotions and sprays come with a comb to remove dead lice and eggs.

How do you get rid of lice if treatment doesn't work?

If you live in one of these areas, or if you try over-the-counter treatments and they don't work, make an appointment with your primary care doctor or a dermatologist to seek prescription treatment. Prescription creams or shampoos may help eliminate head lice when over-the-counter treatments aren't effective.

What is the best treatment for resistant head lice?

Spinosad (Natroba).

Spinosad is approved for adults and children age 6 months and older. It can be applied to dry hair and rinsed with warm water after 10 minutes. It kills lice and nits and usually doesn't need repeated treatment.

What is the strongest head lice treatment?

Malathion (Ovide).

This very strong lotion paralyzes and kills lice and some lice eggs. It's approved for use in kids aged 6 years and older. If you still see lice moving 7-9 days later, you'll need a second treatment.

How to Treat Lice Without Chemicals | Consumer Reports

What is the strongest medication for lice?

Ivermectin (Stromectol) is available by prescription as a tablet taken by mouth. The oral drug effectively treats lice with two doses, eight days apart. This drug is typically used when other treatments haven't been effective. Children must weigh at least 33 pounds (15 kilograms) to take oral ivermectin.

What kills 100% of lice?

Tea Tree Oil. Though many people are sensitive to tea tree oil, it has been shown to be effective at killing lice. One study showed a 100% mortality rate after 30 minutes of treatment. A tea tree oil-scented spray or shampoo may be useful in preventing reinfestation.

How do you get rid of constant head lice?

Mechanical removal or 'comb and conditioner' method

Mechanical removal involves applying conditioner to dry hair. Cover all of the hair with conditioner, detangle hair with normal comb and separate into sections. Then, using a fine long toothed metal lice comb, comb through the hair in sections.

How to get rid of super head lice?

How to Treat Super Lice. If you have active lice, you should start by using pyrethrin shampoo or other over-the-counter lice treatments. Make sure to carefully comb your hair with a nit comb every night, and wash and dry linens, clothing, hats, and scarves. Repeat the treatment after 7 days.

Why are my head lice not going away?

It's possible that you are dealing with head lice that are resistant to the active ingredient in your treatment product. Consult with your pediatrician or contact a pediatric dermatologist for a prescription head lice treatment.

What happens if you don't get all nits out after treatment?

Special nit combs are available in the store where you bought the lice treatment. 4. Most of the time a second treatment is necessary. If you don't kill the nits, they will hatch and your child will have lice again – this time without any contact with another infested child!

Why am I having a hard time getting rid of lice?

Lice can be tricky to get rid of because nits can remain unhatched on your head or you might pick up lice that are still on bedding or other items. Here's what to do if you've had lice — or someone in your family has: Wash bed linens and clothing that anyone with lice has used recently.

How many nits is a bad infestation?

While a study in Georgia (14) found that having five or more nits within 0.6 cm of the scalp was a risk factor for becoming infested with active lice, this occurred in fewer than 32% of such children (14). For children with fewer than five nits close to the scalp, only 7% became actively infested.

What do lice hate in hair?

What repels head lice? Coconut, tea tree oil, lavender, eucalyptus, rosemary, lemon grass, and peppermint are scents popularly believed to repel lice. Using any coconut scented shampoo and conditioner is an easy way to increase your defense. At 1% concentration, tea tree oil killed 100% of head lice after 30 minutes.

What to do if lice keeps coming back?

How to Keep Lice from Coming Back
  1. Wash and dry bedding, clothing, and stuffed toys using hot water (130 F) and high heat.
  2. If the items can't be washed, seal them in a plastic bag for 3 weeks. Dry cleaning also kills lice.
  3. Vacuum upholstered furniture and rugs.

What is a nit bomb?

KP24 Nit Bomb treatment causes the head lice eggs (nits) to dehydrate, thus resulting in a clicking sound when squeezed. Comb out lice eggs (nits) thoroughly after treatment. Isopropyl myristate, Cyclomethicone, Polysorbate 80.

Is it better to comb for lice with wet hair?

Cover the shoulders and back of the person with a white towel or sheet to make it easier to find any lice that may fall off while combing. 2. Wet the hair and comb through with a regular comb or brush to remove any tangles (it is easier to comb wet hair).

What do doctors prescribe for super lice?

FDA-approved to treat head lice in today's resistant world. Natroba (spinosad) Topical Suspension 0.9% is a prescription medication for head lice that is approved for use in children 6 months of age and older.

What is considered a severe case of lice?

If you have head lice, you'll usually have up to around 30 lice living on your scalp. But if you have a severe case, there could be up to 1,000 lice. Female head lice lay eggs near your scalp. The eggs are attached to your hair with a glue-like substance.

Why did my lice suddenly disappear?

Head lice sometimes go away on their own because there are not enough insects to maintain the infestation, or they may persist for an indefinite period without treatment.

Are lice clinics worth it?

Killing lice is the only way to get rid of them. Washing your hair won't be enough because lice actually thrive in water. A professional lice removal appointment with a lice clinic capable of killing medication-resistant super lice is the best way to fully get rid of lice.

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