Mosquito
Mosquito bites look like swollen red spots the size of a berry. Most often they appear in open areas of the body. Mosquitoes bite the spots where the skin is very thin and it’s easy to get to the blood vessels. When they bite, they inject their saliva into the wound. The saliva contains anticoagulants that make the blood thinner. They cause the skin to become red, to itch, and to swell.