Each chemical class kills bed bugs using a different mode of action. It can be helpful to use pesticides that differ in their mode of action because it can reduce the likelihood that the bugs will develop resistance.
Bed bug infestations are very traumatizing and it may take time to get over what you have experienced. There have been many cases where people feel still being bitten, even though the bed bugs have been eradicated from the home. Rash or scratches from Bed bugs are usually in the morning 98109.