At one time bed bugs were almost eliminated from the United States. However, currently they are found in all 50 states including Iowa.The number of cases of bed bugs in Iowa is increasing. Bed bugs spend 99 percent of their time hiding. They are rarely active during daylight hours, and only come out when they sense the warmth and odors of a body at rest. They come out very briefly at night, run right up to the bed, find the first piece of exposed skin, and feed. It takes a few minutes for them to feed, then they go back to hide again. In general, bed bugs seek a meal of blood every 4 or 5 days. However, they can survive for weeks to several months without eating. Bed bugs do not transmit disease. However, bed bug bites can cause large itchy welts on the skin. Another evident sign of infestation is small bloodstains from crushed bed bugs or dark brown spots from bed bug droppings on mattresses.The typical life span of a bed bug is between 10 months and a year.