Why does it itch when bitten by a mosquito and what is the principle?

Almost everyone has the unpleasant feeling of being "bitten" by mosquitoes, in fact, it should be said that they are "stung" by mosquitoes. Mosquitoes can't open their mouths, so they won't bite on the **, it actually uses 6 needle-like structures to pierce people**, these short needles are the center of the mosquito's edible mouthparts.

These short needles suck human blood in the same way that they draw blood; The mosquito also releases saliva containing anticoagulants to prevent blood from clotting, so that it can feast peacefully. When the mosquitoes are full of food and drink and float away, all they leave behind is an itchy lump.

However, the itchy sensation is not caused by a short needle pricking or chemicals in the 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. Histamine causes swelling of the tissues around the bite when blood flows to the bite site to speed up tissue recovery, and the intensity of this allergic reaction varies from person to person, with some people having a more severe allergic reaction to a mosquito bite.

Mosquitoes secrete lubricating fluid in order to suck blood smoothly, and the lubricating liquid is acidic, and it will itch when it enters the muscles, so you can use soap and laundry detergent (they are all alkaline) to wash it, because the acid and alkali are neutralized, and it will not itch.

Being bitten by a mosquito is mainly due to the allergic reaction caused by the mosquito's toxin entering the **, and itching symptoms will occur.

Mosquito saliva is injected into the bite site, and the mosquito's saliva contains a large amount of allergens such as proteins, resulting in an allergic reaction at the bite site. Allergic reactions can trigger an inflammatory reaction, and after the redness and swelling pain, the inflammation causes the bite site to release a large amount of histamine, which can affect the reaction of many cells, especially allergic reactions and inflammatory reactions.

Allergic reactions and inflammatory reactions can cause itching to worsen. Therefore, I always want to scratch with my hands, and after scratching, I will release a large amount of histamine locally, which will lead to the aggravation of allergic and inflammatory reactions, forming a vicious circle. Therefore, after being bitten by mosquitoes, it is recommended to apply ointment, safflower pollen or wind penetrating limb fuel essence to avoid scratching vigorously, so as not to aggravate inflammatory reactions, allergic reactions, and adverse consequences caused by secondary infection.

Generally, after being bitten by mosquitoes, the toxins of mosquitoes enter the **, which may cause red spots or itching symptoms in the local area. If the symptoms are not particularly severe, there is generally no need for special **, and it is necessary to do a good job of nursing measures to gradually recover, but if the itching symptoms are more obvious, you can also use calamine lotion, hydrocortisone butyrate cream and other drugs under the guidance of a doctor**, and if necessary, you also need to take anti-allergic drugs**, such as loratadine tablets, levoxetirizine hydrochloride tablets and other drugs**.

During the period, you need to develop good living habits, do a good job of nursing measures, try to wear loose cotton clothes, and avoid friction between hunger and hunger. Usually develop good living habits and pay attention to a light diet.

The cause of itching after mosquito bites is mainly caused by the saliva secreted by mosquitoes, which induces allergic reactions in the human body.

In life, we often experience the symptoms of itching after being bitten by mosquitoes, but generally we don't feel itchy at first, and the itching becomes more and more obvious when the bite site swells.

The reason is that after the mosquito bites the human body, its mouthparts inject saliva into the human body, which can secrete a kind of macroenvy organic acid similar to the effect of anticoagulants, so that our blood will not coagulate, which is conducive to better absorption.

This organic acid is a foreign body for the human body, coupled with our ** is more delicate, or has an allergic constitution, it will cause immune reactions and allergic reactions, immune tissues release histamine, leukotrienes, etc. to fight against thrombin secreted after mosquito bites, it will produce a feeling of coarse hunger and itching.

Some people also experience more and more itching, because after repeated scratching, the flow of blood under the skin is accelerated, causing histamine and anticoagulant proteins to spread more widely, and the scratching will become more and more itchy.