Why did people in the 70s get lice on their heads, but now they don t?

In the past, people were not in good economic conditions, they used laundry detergent to wash their hair, and they only washed their hair once for a long time, but now people have all kinds of shampoo alone, and they wash their hair almost every day, and they are very hygienic, so there are no lice on their heads.

Because in the 70s people didn't pay attention to hygiene, now people pay attention to hygiene, so people nowadays don't get lice.

It is because people nowadays pay great attention to hygiene, and they will wash their hair once every 2 or 3 days, especially paying special attention to the cleanliness of their hair, so there will be no such phenomenon.

This is because people in the 70s lived a hard life and did not pay attention to hygiene, which is why they got lice. Now that people's living standards have improved, they are more concerned about their own hygiene, so they do not grow lice.

In the past, there was a shortage of materials, and the houses were all mud houses, brick houses, etc., and lice were very easy to grow on their bodies. Later, with the improvement of living conditions, the application of various sanitary products, the sanitary conditions were greatly improved, and lice were gradually eliminated.

A: Lice are parasitic on mammals. Therefore, if people and animals come into contact with each other frequently, they may be infected with lice.

But at that time, toiletries were limited. In addition, people at that time did not pay much attention to their own cleanliness. That's why there are lice on the head like that.

It is mainly related to our living environment, the living conditions of people in the past were not very good, and it was easy to grow insects, but now people's living conditions are good, and the environment in all aspects is also very clean, and there will be no lice.

At that time, the conditions were limited, and it was not possible to wash hair regularly, and there was no shampoo, so lice would grow, and now people wash their hair once a day, and this does not happen.

In the 70s, people did not pay attention to the key to life, hygiene and health, and did not take a bath often, which would breed a lot of bacteria and produce lice.

Because in the 70s, the living pieces were relatively poor, the resources were not good, and there was no money, modern people's lives have become better, they are all happy, and they wash their hair every day, and they also pay attention to personal hygiene.

Because people nowadays are very clean, and the laundry detergent and laundry detergent they use are some phosphorus-containing substances that will kill lice.

No, it was because people often didn't take a shower at that time, and they didn't pay attention to their own hygiene, and at the same time, they wore clothes for a long time.

Because nowadays people are very concerned about personal hygiene, and they will also bathe frequently, but people did not have this condition before.

Won't fly. Adults and nymphs of lice suck blood on the host for life. The main hosts are:

Terrestrial mammals, a few marine mammals, are also often parasitized by humans. Lice are not only harmful to blood sucking, but also make the host itchy and uneasy, and can transmit many important human and animal diseases.

There are three kinds of lice parasitic in the human body: body lice, head lice and pubic lice, among which body lice are the most important, which is the main vector for spreading epidemic banban, cold, lice-borne relapsing fever and trench fever. A brief explanation of the types of lice:

1. Body lice. Commonly known as: clothing lice, gray or grayish-white, the head is slightly olive-shaped, the thoracic segments are fused and indistinguishable, and there are pairs of stomata on both sides of the mid-thorax.

The abdomen is long and flattened, divided into 9 segments, 7 segments can be seen in appearance, a pair of stomata on both sides of each segment, the tail end of the abdomen of the male lice is round and blunt, and the tail end of the female lice is bifurcated, resembling a W shape.

2. Head lice. The body color is darker, the body is smaller, the belly edge is dark black, and the others are similar to body lice.

3. Pubic lice. grayish-white, almost equal in width to body length, short abdomen, indistinctly segmented, wart-like protrusions on both sides, the last pair being the largest, the front legs are small, and the middle and hind legs are thick.

Causes: 1. The production of head lice is mainly under unhygienic conditions. If you don't wash your hands and clean your hair, oil, sweat, and dirt will stay on your scalp and hair.

This provides a good environment for lice to produce and reproduce. So be sure to wash your hair frequently, at least 2 times a week.

2. Due to transfer. Head lice can be transplanted from one person to another. A person with head lice may also have lice on his carpet, sofa, and bed sheets. Hats, combs, pillows, etc. can cause head lice.

Solution: 1. Sulfur ointment, which can only be relieved but not **, is easy to repeat when stopped, and generally requires 1-2 months. Apply 3-5 times a day.

2. Lindan cream, which also relieves the symptoms of pubic lice, is more toxic and can not be **. Generally, it is required to use 3-5 times a day for 20-30 days.

3. Use Kangwang shampoo, the effect is average.

4. Wash your hair with a grate (bì) (a comb as thin as your hair for lice and lice) and then run it down the grate. Wash your hair once a day for 4 or 5 days in a row, and the effect is very good, but now grates are difficult to buy, only in the countryside.

5. Follow the path to find lice, wash your hair first, the lice are wet and can't walk, the lice will come out to breathe, and the lice will appear on the surface of the hair and on the tip of the hair and the temples, the effect is very good.

6. Use white vinegar to wash your hair. Wet the hair and scalp, the back of the ears, and the back of the neck with white vinegar, wrap tightly and cover for 5 to 10 minutes, lice will die in large numbers after being fumigated with vinegar, and then wash the hair. Whether white vinegar kills lice eggs is unclear.

Introduction: Head lice is a small gray wingless insect, female lice begin to lay eggs 1-2 days after mating, about 3-9 grains per day, and can produce 50-150 grains in a lifetime. The eggs are yellowish-white, sticky to the hair, after 5-10 days, hatch into larvae, grow into larvae for a few hours, that is, can suck blood, often used lice Lishu and so on.

The larvae shed their skin three times and became lice, and after two weeks they lay eggs and multiply very quickly. Head lice occur most often in children, especially girls, and can cause epidemics in schools, so they should not be ignored. Mode of infection Infection is caused by contact with the head, comb, hairpin, hat, bandana, etc. of the patient.

Preventive care: 1. Do not use other people's toiletries.

2. Develop good cleaning habits and wash your hair frequently, at least once a week.

3. Do not contact people with head lice to avoid infection.

4. Active and effective prevention of pubic lice.

5. Try to keep your hair dry, and try not to cover or tie your hair after rain or washing, so that your hair dries quickly and avoid creating a warm and moist environment for lice. Maybe some people have poor personal hygiene and lice are the reason.

The teacher is just a parasite, and it is a harmful disease, and whoever doesn't love cleanliness will have lice, and people who love cleanliness rarely appear.

Lice are parasitic parasites that live on animals and live by sucking, and they grow when people come into contact with animals.

What should I do if I get lice on my head?

Wash your head with shampoo first, rub some on your head with vinegar, rub it constantly, then put on a shower cap, cover it for about 15 minutes, then rinse it with water, and wash it again with shampoo.

Used fashion towels, ** and other items need to be often taken to the sun to dry; The corners of the bed and the corners of the house should be cleaned.

Then with the use of lice removal products, you can use Yujin Shile essence cream, this is not ***, just use it for 5 days.

It's not like it used to be, and a little shampoo can be easily done with a few more rinses.

No. But it will lay eggs. In vain. It's disgusting.