Bedbugs are the kind of parasitic creature that nightmares are made of. Aside from causing fear in many people, they are disease bearing and blood feeding creatures, which makes them dangerous to humans. Bedbugs are found not only in beds but in all sorts of upholstered furniture, including couches. It is advisable to get rid of them--they feed on human blood and may pass disease in the process.
Identify affected areas by looking for blood stains and dark spots. Blood stains can signify bedbugs that have popped or blood that has leaked from a person. Dark spots can signify fecal matter produced by the bedbugs.
Vacuum the affected areas to preliminarily eliminate any bedbugs on the surface. Empty the vacuum into the garbage and get rid of it to avoid bedbugs getting loose elsewhere in your home. Clean any blood stains or dark spots with upholstery cleaner.
Seal the couch, couch cushions, pillows and any other affected areas in vinyl furniture covers to starve the bed bugs over time.
The only way to truly end a bedbug problem is to get rid of the affected piece of furniture.
Don't use pesticides on beds or couches; they are places where you spend too much time and could become sick from the pesticides.