Why it Itches when mosquitoes bites us?

Thaum cov poj niam yoov tshaj cum qaub ncaug lawv cov tawv nqaij kom ua rau lawv cov tawv nqaij kom lawv tuaj yeem nqus tau qee yam ntawm koj cov ntshav tom qab siv los ua qe, lawv hno koj qee yam ntawm lawv cov qaub ncaug. Cov qaub ncaug no pab lawv haus cov ntshav sai dua, vim hais tias nws muaj cocktail ntawm anticoagulants.

Thaum cov poj niam yoov tshaj cum puv puv los ntawm koj cov ntshav los yog cuam tshuam, nws yoov tawm, tawm hauv qee yam nws qaub ncaug. Koj lub cev hnoos koj lub cev tiv thaiv kab mob hauv lub cev raws li qhov lus teb rau qhov muaj cov qaub ncaug no. Nws tsim tawm ntau hom tshuaj tiv thaiv uas yog tig khi rau cov antigens hauv cov yoov tshaj cum qaub ncaug. Qhov no ces ua rau kev tso cov tshuaj histamine. Histamine yog ib qho chaw nitrogen uas, ntawm lwm yam, ua rau muaj kev mob teb. Nws kuj pab cov ntshav dawb thiab lwm cov proteins kom koom nrog cov neeg ua haujlwm hauv lub cev los ntawm kev ua cov kab mob hauv cov hlwb cov kab mob no ntau dua. Cov kab hauv qab, cov keeb kwm xaus rau qhov ua rau cov hlab ntsha ze ntawm lub qhov muag tuaj. Qhov no ua rau muaj xim liab, khaus khaus qhov chaw uas muaj yoov tshaj cum poked koj.

Khawb lub thawv tsuas ua rau qhov no loj dua vim tias nws ua rau khaus thiab ua rau ntawm qhov pom, ua rau koj lub cev tiv thaiv nws xav tau ntxiv antibodies kom tshem tau cov kabmob txawv tebchaw. Yog li qhov koj khawb, qhov ntau nws yuav swell; nws khaus nws yuav tau txais; thiab ntev nws yuav kav.