Horse flies prey on other insects, livestock and, given the opportunity, people. A bite on or near your eye can cause swelling and discomfort. Fortunately, most bites heal on their own within a day or ...

An annoying bite ... to the mosquito's saliva by releasing histamines and leukotrienes. This reaction varies between ...

Histamine generated in reaction to a mosquito bite causes irritation, vasodilation (widening of blood vessels), and oedema (swelling), resulting in raised bumps on the skin.