Search for their waste
The first sign bed bugs are present in your couch is their waste. Bed bugs, like any other insects are very hard to find but they always leave something behind. One of the biggest indicators that your mattress is infested with bed bugs is their droppings. Search your mattress for dark spots that can either be solid feces, eggs, shed skins and blood blots. If you find a handful, then there are more bed bugs than you expected.Search yourself for bites
One of the biggest evidences of bed bug infestation is bed bug bites. Bed bug bites symptoms are very hard to identify because it takes a while before you feel the itchy sensation. They are also very hard to compare with other insect bites because they are closely identical. Even though it is usually an itchy bite that we ignore, there are some cases wherein it reaches a large magnitude. There are some cases when bed bugs bite baby infants and transfer diseases like hepatitis b and Chagas disease. Search for their lairs
If there are bugs, then they must be hiding somewhere. Their hiding places include crevices in the mattress, holes, the folds in the linens, nearby carpets and furniture, curtains and many more. Seeing a live one may be unlikely but seeing a dead one is a first sign that bed bugs are really present in the area.
Catch them red handed
If you still want solid proof that there are bed bugs around, then you may want to stay up late and see them for yourself. Bed bugs are nocturnal creatures, so have a flashlight with you in your sleep. Turn the lights off and wake up at around dawn. With the flashlight, watch the bedbugs slowly creep through your sheets. This, however, does not guarantee a 100% sighting especially if you only have a few.