Head Lice | Symptoms and Causes

Who never went through this childhood discomfort or knows someone close to them who had them? The louse is an insect that lives in the hair and feeds on human blood. Everyone can have lice, but mostly it appears on the heads of school-age children.

The scalp louse is an insect that feeds on people’s blood and reproduces quickly. Transmitted from one person to another, it settles in the hair follicle, that is, at the base of the hair, where it deposits its eggs – the nits, which are easy to recognize and which differ from dandruff by being attached to the hair.

The adult louse measures about 2 to 3 mm (the size of a sesame seed), has six legs, and its colour varies from brown to greyish-white. The female lives for three to four weeks and, as an adult, lays up to 10 eggs a day.

Each can lead to 300 lice in a month, so it is necessary to control the infestation as soon as possible and ensure that both adult lice and nits are eliminated.


Eggs are attached to the roots of the hair using a substance similar to glue.

Viable eggs are camouflaged in the infected person’s hair; the shell of empty eggs, nits, is more visible because white. Many call both viable eggs and empty eggshells nits.

The eggs are incubated with the heat of the human body and hatch in 8 to 10 days, in general.

The nymph leaves the egg and goes through three stages until it becomes an adult between 9 and 12 days. About 1.5 days after becoming an adult, the female can reproduce. If the infestation is not treated, the cycle will be repeated every three weeks.

Failure to treat pediatric capillary pediculosis can lead to poor school performance due to itching, sleepless nights and, in the most severe cases, anaemia caused by the hematophagy of these insects.


Causes of the appearance of lice

Causes of the appearance of lice

You can get lice when it comes into contact with the insect or its eggs, which usually hatch in about a week. The slime does not jump; it crawls.

Therefore, it is only transmitted through direct contact between the infected person and the uninfected person.

Here’s how a person can get lice:

Through contact with a person who already has lice. This is very common among children and people from the same family, who live in the same place, share particular personal objects and interact closely.

Storing lice-infested clothing in closets or storing personal items such as pillows, blankets, combs, and stuffed toys can allow lice to spread around the cabinet or house.

Interesting is that by combing dry hair, static electricity can be generated that can throw those insects at a distance of up to one meter.

Symptoms of lice

Symptoms of lice

The main discomforts are intense itching and irritation of the scalp, with rashes that usually appear on the nape of the neck, above and behind the ears, accompanied in the most severe cases of enlargement of the lymph nodes.

Symptoms usually appear soon—the same day or, at most, the day after the infection. Usually, the itching begins as soon as the parasite bites to feed. And it is the substances in the saliva of the louse that provoke this reaction.

An aggravating factor – the signs described above can appear up to two months after the “invasion” of lice. So there are people who do not feel anything, that is, those who do not think itching at first and therefore, the number of lice increases and increases.

These children will only report symptoms or show signs after the infestation is already significant. If a child is infested with a single female, which every seven days produce new nymphs, which after two weeks become adults and reproduce, then, in two months, it can have dozens and dozens of lice.


Lice treatments

Removing lice and nits requires patience and discipline, but you will certainly be rewarded if you follow the recommendationsed.

Gone are the days when a person with lice had to shave their head. Today, lotions and shampoos containing permethrin work well in the treatment of lice.

Lice are usually removed with treatment. However, they can recur, especially if the source of the problem is not fixed. For example, a room with many infected children can cause children to become infected several times with lice.

Remember that treatment should be extended to the entire family and couples, even if they are asymptomatic. It is essential that, without exception, students who have been in contact with the affected child are treated simultaneously.

One of the products that have been revolutionizing the system to end lice is the electric anti-lice comb LC 860 of the Medisana brand. It is an efficient utensil for lice, which effectively removes lice and nits from the head with a simple brushing.

No side effects: Lice die from an electrical impulse upon contact with comb barbs.

It effectively removes lice and their nits with a simple combing without any side effects since no chemicals are used.

It is also suitable for dogs and cats: Often, our quadrupeds also suffer from lice. Whether human or animal, Medisana’s LC 860 electric lice comb is equally ideal for pets, dogs and cats and can provide quick and effective help.

As the comb comes with batteries, it can be used outside as well.

On contact with the barbs of the comb, lice die from an electrical impulse. The electric comb for lice LC 860, therefore, does not have any side effects.


Recommendations to avoid lice

Check children’s heads frequently. Do not follow homemade recipes, which are ineffective and can be harmful to your health.

It is easier to identify and treat lice when the hair is short, but the length does not influence the risk of infestation or its treatment.

The whole family should be examined. If relatives share the bed, they should be treated even if they do not have lice. Clean all items for personal use that have been in contact with the infected person’s head within 24 to 48 hours before starting treatment.

Check that the eyelashes and eyebrows are also not affected by the insect.

It is difficult to prevent the spread of lice among children in school and children’s settings. There is a lot of close contact between them and their belongings so that lice can spread quickly.

The presence of lice in children is not a reflection of poor hygiene habits, nor can it be understood as a lack of parents.

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