They are often found in hotels because they can travel easily in luggage, purses and briefcases, the company's website said.
Signs of an infestation include not only the bugs, which are about the size of an apple seed, but also the empty skins that young bed bugs shed as they grow. They also leave behind their droppings.
Homeowners may also discover bites on their bodies when they wake up. Bed bugs prefer to be active at night, when their hosts are asleep, Orkin said.