Bed bug bites cause itchy red bumps. They are usually less than ½ inch (12 mm) in size. Some are larger (like a hive).

How do you know if bites are from bed bugs?

Unlike flea bites that are mainly around the ankles, bedbug bites are on any area of skin exposed while sleeping. Also, the bites do not have a red spot in the center like flea bites do. People who don't realize they have a bedbug infestation may attribute the itching and welts to other causes, such as mosquitoes.

Do bed bug bites get bigger?

Over time, bites get worse. When adult bed bugs bite, they inject more anticoagulant. And, over the course of several exposures to this anticoagulant, the allergic reaction increases. Bites that start out as tiny dots that can become painful, itchy, swollen welts.