If you see the insects, their eggs, shed skins, excretion, or bite marks indicates you have a beg bug infestation. Bed bugs like to nest close to their hosts and you can find the insects, eggs and shed skins in their nests located along mattress seems, in headboards and nightstand crevices, in-between the mattress and box springs, or in other various cracks and crevices. Their excretions are red or brown spots of dried blood, found on your sheets or mattresses. Bite marks are the body’s reaction to the saliva injected as the insect feeds. They typically appear in a row of several bites. Reactions to their saliva will vary due to a person’s sensitivity and often don’t show immediately after the bites.