Cockroaches can be carriers of disease because of their tendency to hang around waste deposits. Their rotting corpses have been known to cause allergies and acute respiratory illness in children. They like to be in kitchens or anywhere food is kept and they hide in dark, warm and very narrow spaces. Because of this, the source of an infestation can sometimes be hard to reach. Professional pest control is important to rid the home of roaches before the infestation gets out of control.