Mosquito is a common insect in summer. We must have experienced being bitten by mosquitoes. Is there any harm to human body after being bitten by mosquitoes? What kind of people do mosquitoes usually bite? Let's have a look
Mosquito is one of the four pests; Its average life span is not long, 3 ~ 10 days for males and 10 ~ 20 days for females.
Mosquito saliva has a vasodilator and anticoagulant substance, which makes it easier for blood to flow to the bitten place. After being bitten by mosquitoes, the skin of the bitten person often shows symptoms of bagging and itching. Almost everyone has an unpleasant experience of being bitten by mosquitoes. More accurately, they should be 'stabbed' by mosquitoes. Mosquitoes can't open their mouth, so they won't bite on the skin. In fact, they use six needle like structures to pierce people's skin. These short needles are the center of mosquito feeding mouthparts. The function of these short needles to suck human blood is just like that of needles for drawing blood; Mosquitoes also release saliva containing anticoagulants to prevent blood from clotting, so that they can eat safely. When the mosquito leaves with enough food and drink, it leaves an itchy swelling. However, the itching sensation is not caused by short needles or chemicals in saliva. We feel itchy because the immune system releases a protein called histamine to fight foreign substances, and this immune response triggers an allergic reaction at the bite site. When blood flows to the bite site to accelerate tissue recovery, histamine will cause swelling of the tissue around the bite site. The intensity of this allergic reaction varies from person to person. Some people have a serious allergic reaction after being bitten by mosquitoes.
Bite target
Mosquitoes do have this' feeding tendency ', which is not what people think that some people have delicate skin and sweet blood to provoke mosquitoes. The main reason is that some of their breath attracts mosquitoes. Generally speaking, the following kinds of people have a special preference for mosquitoes:
First, people with developed sweat glands and high body temperature.
For people who like to sweat, the acidity in the blood is enhanced, and the sweat discharged makes the body surface lactic acid value higher, which is attractive to mosquitoes. In addition, there is a heat receiver in the antennae of mosquitoes. It is very sensitive to temperature. As long as there is a slight change in temperature difference, it can be immediately observed that sweating people's body dissipates heat quickly and will also be attractive to mosquitoes.
Second, people who are tired or breathe faster.
People will breathe faster after engaging in sports or physical labor. Some people have large vital capacity or faster breathing rhythm itself. In this way, there is relatively more carbon dioxide exhaled. Carbon dioxide will form an air flow about 1 meter above the head. Mosquitoes are sensitive to this and will smell it.
Third, people who like to wear dark clothes.
The reason why mosquitoes come out at night is mainly because they have the habit of darkening. If they wear dark clothes, they will show a dark shadow at night, and mosquitoes will chase towards darker places. Clothes such as black are the first choice for mosquitoes to attack, followed by yellow, blue, purple, blue, red and green. Mosquitoes don't like to bite white. Similarly, mosquitoes love to bite people with darker or redder skin.
Fourth, people with fast metabolism.
Therefore, children are vulnerable to mosquito bites, and the elderly are just the opposite.
Fifth, people who have put on makeup.
In order to verify the attractiveness of smell to mosquitoes, American scientists used olfactory instruments to test and analyze more than 3900 substances. It was found that many kinds of hair gel, hand cream, facial cleanser and other cosmetics have unusual attraction to mosquitoes. Most cosmetics contain stearic acid (a kind of fatty acid), so makeup people are more favored by mosquitoes.
Of course, there are some odors that mosquitoes hate. The odors of bay leaf, lemon grass oil, citronella, garlic and geraniol will make mosquitoes retreat.
Sixth, pregnant women.
Pregnant women are particularly vulnerable to mosquitoes. A medical study in the United States shows that pregnant women are particularly attracted to mosquitoes, and their chances of being bitten by mosquitoes are twice as high as other women.
Seven are drinkers.
People also become vulnerable to mosquito bites after drinking, eating beef and mutton or taking antihypertensive drugs.