The Center for Disease Control says a bed bug bite affects each person differently. Bite responses can range from an absence of any physical signs of the bite, to a small bite mark, or even a serious allergic reaction. Bruno Millanese is the owner of Bay Pest Control and says most cases will require several treatments to eradicate an infestation. Millanese says, "What's normal is we will do a complete treatment and set out monitoring boards, then go back in seven to ten days to do a second visit. Sometimes you’ll find eggs that have hatched and sometimes you don’t. We then continue to monitor it and if anything is found, we do a second treatment, then we go back for a third visit in another seven to ten days." The cost of treatment usually will cost a few hundred dollars but could end up costing thousands if the infestation is severe.