Why Do Mosquito Bites Itch?

When a mosquito bites you, it pierces the skin using a special mouthpart (proboscis) to suck up blood. As the mosquito is feeding, it injects saliva into your skin. Your body reacts to the saliva resulting in a bump and itching. Some people have only a mild reaction to a bite or bites.

Why is it bad to scratch mosquito bites?

A: When you scratch a mosquito bite, this causes the skin to become even more inflamed. Since inflammation causes your skin to itch, you can get into a cycle where scratching will cause even more of an itchy sensation.

Why do mosquito bites itch more at night?

You're not imagining it—mosquito bites do itch more at night. “Most people itch more at night because our cortisol levels (our bodies' own anti-inflammatory hormone) is higher in the morning, and also because we are less distracted as we wind down and try to fall asleep,” says Dr.

Alexander Ross

Alexander Ross

Gaming, Esports & Interactive Media Writer

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.