Site about the fight against domestic insects

What are lice afraid of and do they die from the cold

Чтобы борьба со вшами была более эффективной, нужно узнать, чего эти паразиты боятся и использовать это на практике

Knowing what lice are afraid of, you can bring them out in just a few hours, and with a competent approach - all at once. Usually, the procedure for the destruction of lice on the head or other parts of the body requires repeated use of pediculicide drugs, and its success largely depends on how effective the drug is used.

So, let's take a closer look at what the lice are most afraid of and with what methods of physical and chemical effects they can be quickly eliminated both from the parasites themselves and from the nits.

Frost: how to get rid of lice with low temperatures

Lice are afraid of the cold. However, like most other insects, they survive a temperature drop of up to 0 ° C and for some time can remain alive even at negative temperatures. Lice die in the cold in the minus 5 ° C for 20-30 minutes, a stronger frost kills them almost instantly.

Крепкий мороз убивает вшей весьма эффективно и быстро

In this case, lice die in the cold only when they are away from the human body. For example, you can not destroy lice on your head, just walking in the winter on the street without a hat. The hair still retains warm air from the scalp, and although its temperature will be far from optimal for lice, deadly frost parasites there will not be exactly.

On a note

Likewise inefficient will be bathing naked in the hole in case of pubic lice. The temperature of the water even in the sea rarely falls below minus 1 ° C, and lice will easily survive such a dive into ice water. An ordinary person (not a "walrus") can suffer from hypothermia much more than lice themselves.

It should also be borne in mind that lice are sufficiently resistant to oxygen deficiency and long diving of the host under water is easily tolerated.

Nits are also afraid of frost, but not as much as lice themselves. At negative temperatures, nits are able to survive longer than larvae and adult parasites, and after treatment with cold, some of them can remain viable.

Гниды не так чувствительны к морозу, как сами вши

The fear of lice of cold can be used mainly to combat clothing (linen) lice. They spend most of their time on clothes and only move to the body of a person.

Бельевые вши обитают в основном на одежде

Лишь для кормления бельевые вши перебираются на тело человека

To get rid of linen lice, take all the contaminated clothing and post it for a few days to a hard frost. While lice perish in the cold, you should only wear clean underwear, not guaranteed to be infected. After three or four days, all lice and nits in clothes will die.

Если вывесить одежду на мороз, бельевые вши в ней быстро погибнут

It is interesting

Lice and cold - rarely found in nature near. The optimal temperature of reproduction of all lice inhabiting the person is + 31 ° C, and already at + 20 ° C they stop multiplying, and the development of their eggs (nits) practically stops. However, at this temperature, adult insects remain active and continue to feed. Therefore, generally speaking, the "cold" for lice is still quite comfortable temperatures for a person. But in the cold, lice can not move at all, eat, and somehow become active.


"Nobody knows about these pesticides in Koyanov at all. There are two means from lice - kerosene and frost. My grandmother told me that lice were afraid of frost. Just take your clothes and hang in the winter on the street for a few days. It was frozen out - changed, and hung up, too. And all business. But this only works with linen louses . Lobkovoy or the head must be poisoned with kerosene ... "

Pavel, Koyanovo

If, in addition to clothing lice on the body, other types of them parasitize (head, pubic), frost will not help here. You should not even try to freeze parasites from your head or, especially, from the pubic part - you can overcool and seriously damage your health. In this case, lice should be disposed of by other methods.

High temperatures

High temperatures are also difficult to tolerate. At + 40 ° C, they stop multiplying, at + 45 ° C the development of nits stops, and at + 50 ° C adults die within half an hour.

Higher temperatures destroy the parasites almost immediately. However, nits can remain viable at temperatures up to + 60 ° C, and therefore it is ineffective to remove lice by taking hot baths .

Не пытайтесь избавиться от вшей с помощью очень горячей ванны - этот метод неэффективен

High temperatures are used against lice in a different way:

  • lice and their nits are destroyed by digesting contaminated clothing in boiling water
  • pubic and head lice are removed by blowing the hair in appropriate places with hot hairdryers with a leaving air temperature of about 50 ° C. Such treatment does not kill lice , but parasites become lethargic and almost showered off their hair, being no longer able to cling to them. Right after that, the hair is combed with crests from lice.

Вши боятся горячего воздуха, поэтому перед вычесыванием насекомых и гнид можно обдуть волосы простым феном

In general, it can be noted that lice are afraid of hot dry air. The infestation of lice in the desert regions of the world is lower than in wet forests and marshy tropics for precisely this reason. By the way, the technology of using a hair dryer from lice was developed in the desert states of the United States, where local researchers found the susceptibility of parasites of rapid death in conditions of heat and dryness.

Specialized insecticides

These substances are used in the majority of modern shampoos, gels and balms. As a rule, they paralyze the nervous system of lice and lead to their death within a few minutes after applying the product to the hair.

Современные инсектициды быстро парализуют вшей и в итоге убивают их

As such poisonous components, various pyrethroids are used in the composition of pediculicides: Cypermethrin, Deltamethrin and some of their analogues. They are contained, for example, in such preparations from lice, as MediFox, NOC, Bubil and others.

Средство Медифокс эффективно борется как с головными, так и с лобковыми вшами

Effective against lice and a special kind of silicone, called Dimethicone. It works somewhat differently: effectively flowing into the respiratory tract of insects, Dimethicone leads to suffocation of parasites. The substance is part of the Nyuda facility.

В составе средства от вшей Нюда особый вид силикона - Диметикон

Means based on modern insecticides are very effective against lice and are relatively safe to use - they rarely cause allergies and do not lead to intoxication. They are most often used in the fight against lice in children.


Kerosene - this is quite an outdated folk remedy for lice, which, nevertheless, because of its high efficiency is still often used to remove parasites. It poisons adult lice and partially dissolves the nits.

Керосин использовался когда-то бабушками для выведения вшей, но сегодня есть более эффективные и щадящие препараты

Lice are afraid and smell of kerosene, and die when the substance hits the chitinous surface of the body. Half-hour treatment of the head with kerosene allows the destruction of all adult lice and larvae, a second session a week later provides for the extermination of young larvae that have emerged from the surviving nits.


Improper application of kerosene can lead to extensive scalp burns and poisoning, especially in children. When working, do not forget that kerosene is very flammable, and its vapor can ignite from the slightest source of ignition.


According to its effects on lice, vinegar is somewhat similar to the action of kerosene. At the same time, it dissolves the nitric shell much better (more precisely, it softens the glutinous mass with which the nits are attached to the hair).

Уксус даже сегодня остается популярным средством для борьбы со вшами и гнидами

При помощи уксуса можно ослабить крепление гниды к волосу

На фото - гнида, вычесанная с головы

Lice die from table vinegar (9%) in breeding it in the ratio of one part of vinegar to two parts of the water. When using vinegar, you should follow the same safety measures as when killing lice with kerosene - undiluted vinegar can cause skin burns!

Cranberry juice

Cranberry juice is another excellent folk remedy for fighting lice and nits. Lice are afraid of it and die when processing the hair with juice, and nits, when using this product, are easily detached from the hair when combed. This can be used in the joint application of cranberry juice with combs from lice.

Кислота клюквенного сока может ослаблять крепление гнид к волосам

On a note

Lice and nits are generally afraid (conditionally speaking) of strong organic acids. For example, among folk recipes from lice, there are funds with lemon, apple and grape acids.

The simmering water

Hectic water is mostly afraid of adult lice. This tool can be used both for fighting parasites, and for preventing infection with them.

Чемеричную воду можно использовать для отпугивания взрослых вшей

In the first case, chicken water is applied to the head in the same way as shampoo from lice, and in the second case, it is lubricated by hair behind the ears before a possible encounter with an infected person or before a visit to a place where there is a risk of infection by parasites. Lice in this case are much less likely to move to the hair sprayed with crooked water from an infected person.

What lice are not exactly afraid

And this is what lice are not exactly afraid of:

  • Prayer - although this will upset the particularly faithful readers, but the psalms and appeals to the "higher authorities" of the parasites will not have the proper impact, unless you back up such prayers with insecticides or at least kerosene.
  • Conspiracies - the situation with them is similar to the situation with prayers.
  • Talismans - lice on a man do not even suspect that somewhere on the neck and hand, it turns out, there is an object that should scare them. By the way, lice are almost blind and stones on the wrists, even with a great desire to consider can not.

Камни в браслетах смотрятся красиво, но вряд ли они смогут отпугнуть вшей

Most of all lice are afraid of simple hair removal. Shaving a pubis or head allows you to get rid of parasites literally within an hour without chemistry, combing and risk poisoning. Therefore, the machine for shaving - the most terrible enemy of lice on the body.

To the record "What they are afraid of lice and whether they die from the cold" left 18 comments.
  1. Olga :

    Unpleasant, of course. My daughter discovered lice and nits. And itched the whole family.

  2. Julia :

    My beauties also have lice. The second time in 8 years. I cut a little both. Shampoo Chigiya helped only the first time. Like, combing out, and again climbed. In general, I turned to a friend vinegar. Another good drug Hedring. Only, alas, in Russia it is not.

  3. Olga :

    Help, please, the daughter cries every day. Lice and eggs, like, no, but it seems it itches and remains alone. What should I do? Help me please!

  4. Tatiana :

    They already got me so that I'll take off my harsh understanding.

  5. Dasha :

    I just do not know how to deal with nits.

  6. Ayten :

    And we have such a problem. It seems that everything was overheard. Now already pull out the beginnings.

  7. Anonymous :

    Hi, I believe that lice do not need to be displayed! They also need a house.

  8. Anonymous :

    I put out lice, brought them out - after 2 days I'll see, again. Has deduced - in 1 day I look, again. I use chinese water, once.

  9. Anonymous :

    Lice is a horror. Tell me what to do?

  10. Lydia :

    Do not worry: in Israel, schools with lice, teachers say that they do not interfere (they itch). America: all public transport, all with lice, bugs, fleas ... All itch. Yes, vinegar is a good and effective remedy. But it all depends on the concentration. Smart people, who sell vinegar and other drugs, plant everything ... Hold on, Russian Fund, Lydia.

  11. Anna :

    Try kerosene.

  12. Nana :

    None of the pharmacy drugs does not help. At all! And the colors do not help the most vigorous. It feels like they will survive the atomic attack!

  13. Nat :

    Vodka compress very well helps. Spray the hair and rub it in the head, the package on top. For 20 minutes, and then rinse and subtract.

  14. Alain :

    The daughter brought lice. Most likely, from school. The first time I discovered it was too late, as I had not encountered this before, so everyone was infected: I, three children. Only my husband got away. But they got out pretty quickly, and this despite the fact that my daughter and I have thick and long hair. I used Pediculene Ultra spray. Stinks, of course, is terrible, but what to do ... And combed several times a day with a comb.

  15. Svetlana :

    I do not understand where you get lice from. Do not wash yourself, mud at home overgrown? Lice appear from the mud. For example, I had lice in a children's pioneer camp, because we (children) were not allowed to wash at all, there was no shower, baths, and it was summer, heat. Some began to wash their heads under the faucet in the washbasins, but the infection was already dispersed. Everyone was scratched, but no one understood what it was (the children did not understand). The doctor then examined all the children, did not say anything to anyone. So I came home from the camp with lice, there were a lot of them in my hair, horror is simple, my head is dirty, fat. I was amazed that lice are so hard and not even choking. In general, I, the child, was very impressed and frightened, because never in my childhood I had any parasites. Remembering is horrible and disgusting, and I do not want this anymore.

    • Irina :

      Svetlana, lice, in fact, like clean hair, and not dirty. And most of them bring either from transport, or from school, and those who have a mess and dirt in the house.

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