Why do mosquito bites itch? Why do mosquitoes itch when bitten

Mosquitoes can't open their mouths, so they won't bite on the **, they actually use six needle-like structures to pierce people's **, and these mouth needles (stylets) form the center of the mouthparts. These needles suck in blood in the same way that they draw blood; The mosquito also releases saliva containing anticoagulants to prevent blood from clotting, so 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 needles in the mouth 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 use the body heat and physiological changes of animals to search for targets, which may be why human ankles and feet are more commonly bitten by mosquitoes, because the blood vessels in these parts are closer to the body surface, so they release more body heat.

Mosquito; There are about 3,000 species worldwide. It is a small flying insect with stinging and sucking mouthparts. Usually females feed on blood, while males suck the sap of plants.

Blood-sucking female mosquitoes are intermediate hosts for other pathogens such as dengue, malaria, yellow fever, filariasis, Japanese encephalitis, etc. Mosquitoes are found on all continents except Antarctica. Among them, the genera Anopheles, Aedes and Culex are the most famous.

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When summer comes, it is not only necessary to protect against the sun and heat, but the other is the annoying mosquito, and we must always beware of mosquito bites, so why do mosquito bites itch?

Shanghai Jiao Tong University research has found that our brain rewards the central nervous system will make us feel disgusted by itching, and constantly scratching will make dopaminergic neurons transmit a sense of pleasure, so we prefer to "scratch", after being bitten by mosquitoes, it is best to wash with alkaline soap to prevent redness and swelling, or use cold water ice cubes to relieve swelling pain, scratching will only make the redness and swelling bigger and bigger, can not stop itching.

Because of the secretion of acid, you will feel sour when you eat sour things, let alone bite it