Only an expert using a high-powered light microscope can determine if insect bites are caused by bird mites, according to the Department of Entomology at the University of Sydney and Westmead Hospital in Australia. Bird mite bites often cause itching, swelling and welts, reports South Australia's Department of Health.
Birds are the natural host of the bird mite. The mites feed on the bird's blood and usually live in bird nests. When unable to bite birds, bird mites sometimes turn to biting humans in an attempt to find food, according to South Australia's Department of Health. The mites can also live in human dwellings if birds have built a nest in the structure.
Although the mite bites cause discomfort, according to the Department of Entomology at the University of Sydney, the mites cannot burrow under the skin of humans and do not reproduce once leaving their natural host. The mites also cannot cause disease in humans. Bathing removes the mites and an anti-itch cream is usually enough to stop the mite-related itching, according to the Los Angeles County Department of Health.
A bird mite infestation inside a house or other building can be solved by first removing the birds and their nests from inside the structure. Spraying insecticide after the nest is removed usually kills any remaining mites, according to South Australia's Department of Health.