Bed bugs. Bed bugs can cause skin rashes and secondary bacterial infections. They are a parasite that is very difficult to eradicate once present in the home. They are not known to cause the transmission of diseases despite the fact that they bite and draw blood.
Not usually. Bedbugs cause itchy red bumps and in more sensitive individuals an exaggerated form of that. Bedbugs are not known to transmit any disease of a serious nature.