In case of heavy infestation, these bugs can spread out to other areas of the house like the table, sofa, furniture, etc. This parasitic problem will take away your peace, and you will find it very hard to sleep when you have such a problem going on in your house. The reason why you’ll find these bugs at home is that they feed on the blood of humans, bird, and other animals. Most importantly, these bugs suck blood from humans as being their parasites.