Some gnats do bite, according to Healthline. Similar to other bugs, gnat bites can cause tiny, itchy red bumps. The lifespan of a gnat varies depending on its species. But in general, they don't ...
Like female mosquitoes, female gnats feed off blood to develop eggs. However, gnat bites are nastier than mosquito bites. Mosquitoes use their proboscis to burrow under skin and suck out blood.
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