On average, fleas are 2-4 millimeters ... folds. Flea bites can cause an allergic reaction in the form of hives. According to the Centers for Disease Control, the flea’s life cycle depends ...

Or you may have moved into a home in which the previous owner had pets with fleas, which can hang out in their pupal (cocoon) stage ... 2 to 5 days, depending on conditions, says Benson. The flea ...