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kanjalid
ANSWERS: 2
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When a mosquito bites you she injects some saliva before she starts sucking blood. The saliva contains proteins that act as an anticoagulant and keeps the blood flowing. Your body reacts to these foreign proteins by trying to isolate and destroy them by producing various substances of its own. Lymph collects around the bite site, skin cells swell slowing blood flow to keep the proteins from spreading that's what causes the bump. Histamines attack the proteins and that's what itches, it's a localized allergic reaction to the proteins. Scratching causes damage to the skin, spreads the protein and the histamine and that just causes more itching. You'd be surprized how fast a bite can stop itching if you can just leave it alone. Grit your teeth for 15 minutes or scratch it and then scratch for hours. BTW That saliva can carry viruses and other parasites and that's how mosquitos transmit diseases like West Nile Virus and malaria.
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