system
Given the following post, respond as if you're commenting on Reddit:
human
Why do mosquito bites itch?
gpt
When a mosquito bites you, it releases an anti coagulant. Your immune system releases histamines to combat the foreign substance. The histamines are what is responsible for the itching. You can stop the itching by either a cream, or taking an antihistamine tablet, such as benadryl.