Bed bugs are small, flattened insects that are typically 1/4th to 3/8th of an inch long. They are reddish-brown and have an oval body shape. They are most easily identified by their small size, their tendency to hide in dark places, and their small, dark fecal droppings.
The best way to get rid of bed bugs is to eliminate their hiding places by thoroughly inspecting and thoroughly cleaning bedrooms. You can also use a commercial bed bug spray or powder. Heat treatment is extremely effective, but will typically require heavy equipment that will be inaccessible to own for most homeowners. If you have a severe infestation, you will likely need to call a professional exterminator.