Other times, the irritation may feel more like an insect bite. These reactions can become so annoying for some people that they are forced to seek professional help. I'll just concentrate on insects and mites. Insects or minute, biting mites can prove to be the source of irritation. Although these pests are quite small, most are visible upon close examination.
Fleas are the most common source of insect bites within homes.
They usually bite people around the ankles, producing a small, red, hardened, and slightly raised welt. Fleas are most often associated with pets. Lice may also cause intense itching and irritation. Because lice cannot survive away from a human host, treatment of premises is not normally required. Mites are very tine arthropods which occasionally infest structures and bite people.