Why do mosquito bites become large red lumps under the skin after scratching?

Answer 1

When a mosquito bites into you it leaves it saliva and when it is done or disturbed the saliva is still in you. Once the body's immune systems get at the saliva it produces many antibodies in which attach to the saliva. Then the antibodies release histamine which creates that pinkish,itchy bump where the mosquito bit you.

Answer 2

Because your body gets inflamed by the mosquito stuff. To stop the itch, just swab on the bite some antiperspirant.

Answer 3

This is because the mosquitoes release toxic substances that cause the skin swell up and irritate the skin.

Answer 4

Because they get irritated and swollen.