Why do mosquito bites itch? What you didn’t know about mosquitoes

Shorts and watermelon popsicles in summer, and beauties in short skirts in the hot sun on the beach, what annoys you most in such an enjoyable summer? Definitely a “buzzing” mosquito! Let’s talk a little bit about mosquitoes.

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Why do mosquitoes bite and why do they itch?
Mosquito bites mainly require human blood to reproduce the next generation. Therefore, it is female mosquitoes who bite people, and mosquitoes do not bite people when they encounter them. Usually females feed on blood, while males suck on plant sap. Mosquitoes are found in every continent except Antarctica.

In fact, it should be said that it was “stabbed” by mosquitoes. Mosquitoes can’t open their mouths, so they don’t bite on the skin. They actually pierce the human skin with 6 needle-like structures. These short needles are the center of the mosquito’s mouthparts.

These short needles suck blood like needles used to draw blood; the mosquito also releases saliva containing anticoagulants to prevent the blood from clotting, so it can safely gorge on. When the mosquitoes are full and sated, they leave behind an itchy bump.

Anticoagulants - NPS MedicineWise

However, the itching sensation is not caused by a short needle prick or by chemicals in saliva. We feel itchy because the body’s immune system releases a protein called histamine to fight foreign substances, and this immune response triggers an allergic reaction at the bite site.

How do mosquitoes grow?
The mosquito’s life goes through four stages: egg, larva (larva), pupa, and adult. Mosquitoes like to lay their eggs in clear water, and in warm seasons, the eggs hatch as larvae in about three days. The widow sheds its skin and finally stops eating and becomes less active and turns into a pupa. About two or three days later, the pupae come to the water surface and shed their skins and emerge as adults and fly out. A female mosquito can lay an egg once it is full of blood, and it can lay six to eight eggs in her lifetime, with 200 to 300 eggs each time. Therefore, eliminating one mosquito in the early stage is equivalent to eliminating hundreds or thousands of them.

Can mosquitoes survive winter?
Generally, mosquitoes begin to appear in April each year and reach their peak activity in mid-to-late August. When the climate cools down and the temperature drops below 10°C in autumn, mosquitoes will stop breeding and die in large numbers. Very few mosquitoes will survive. They hide in the cracks and other places where they can take shelter from the wind and cold, such as hiding in warmer and more sheltered places indoors. , such as the back of the wardrobe, etc. But it will avoid hot places, such as heating and so on. This can not only escape the harsh winter, but also reduce the metabolic rate and avoid starvation and death. Kind of like hibernation.

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Outdoors, mosquitoes generally hide in warmer places such as heating pipes, and the mosquitoes that appear in the second year are more hatched from eggs.

The lifespan of mosquitoes is about 7 to 10 days after mating of male mosquitoes under natural conditions, but can live to 1 to 2 months in the laboratory. Female mosquitoes generally live 1 to 2 months, and have lived up to four months in the laboratory.

Who is more likely to be bitten?
Mosquitoes do have this “feeding tendency”. This is not because people imagine that some people have delicate skin and sweet blood to attract mosquitoes. The main reason is that some breaths on their bodies attract mosquitoes. Generally speaking, the following types of people and mosquitoes will “have a soft spot” for them.

One is people with developed sweat glands and high body temperature. The second is people who are tired or have a fast breathing rate. The third is people who like to wear dark clothes. Fourth, people with fast metabolism. The fifth is people who have put on makeup. Six are pregnant women. Seven is a drinker. However, there are also studies now saying that people who are easy to be bitten by mosquitoes are genetic problems.

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What to do after being bitten?

  1. After being bitten by mosquitoes, most people will experience symptoms such as redness, swelling, itching and pain. At this time, alkaline substances can be used.

For example, ammonia water can be used to relieve itching, or soap can be dipped in water and applied to the red and swollen area, which can relieve the itching within a few minutes.

  1. If the bite is very itchy, you can flick it with your finger first, and then apply toilet water, wind oil, etc.
  2. Apply or brew the itchy area with salt water, which can soften the lump and relieve itching effectively.
  3. The juice from aloe vera leaves can be used to relieve itching. When it is red, swollen, and itchy after being bitten by mosquitoes, you can cut a small piece of aloe vera leaf, wash it, break it open, and rub it on the red and swollen area for a few times to relieve the swelling and itching.
  4. Light a match and blow it out and bake the place where the mosquitoes have bitten. You can also apply toothpaste, red syrup, and some Wuji ointment with anti-inflammatory, antipruritic and analgesic effects.
  5. Break open a garlic clove, apply the mosquito bite bag with the cross section, it will be fine for a while, and it will relieve itching (this method is especially suitable for pregnant women after being bitten by mosquitoes)

You can choose the most convenient way~