Why do mosquito's bite itch?

“When a mosquito bites, she leaves behind saliva. In fact, the saliva present in mosquito bites serves the mosquito well, since it works as an anti-coagulant. These means the mosquito can quickly draw blood without catching your attention.

“The saliva injected when a mosquito bites causes our bodies to produce a histamine response. We have a slight allergy response, and thus our skin around the bite area gets itchy.” (Via)

It’s amazing what you can learn when you type questions into Google.. ;)

They have a sort of inflammatory agent in it’s sali—crap.

Slow on the draw again.

In simple words: you are allergic to their spit so it makes you itch.

Welcome to the collective. Easy @AlenaD, newbie!

THANKS FOR THOSE WONDERFUL ANSWERS! KNOWING IS GROWING, KEEP THAT IN MIND.

Welcome, it’s “bitten” and not “bit,” and please don’t shout.

I wasn’t being mean. Lots of people don’t realize you can type questions into Google.