On most people, bed bug bites look like itchy red bumps on their body. However, it can be difficult to know if the bite marks have been caused by bed bugs or not. According to the Centers for Disease Control and Prevention (CDC), the symptoms of bed bug bites may not appear for a few days.
While bed bugs may seem like an invisible threat, they do leave behind signs of their presence, mainly in the form of their droppings. Learn more.
Bed bugs form clusters around the edge of your bed. Their droppings take the form of undigested blood which ceases to be red once it dries. Their droppings are black in color, measuring micrometers in diameter.
Learn about identifying bed bugs. Bites on the skin are a poor indicator of a bed bug infestation. Bed bug bites can look like bites from other insects (such as mosquitoes or chiggers), rashes (such as eczema or fungal infections), or even hives. Some people do not react to bed bug bites at all. On this page: Looking for signs of bed bugs
The droppings are the digested blood and also the signs that the bugs have already bitten someone, maybe you, during your sleep. It is in the form of some clusters o tiny spots on the bed and other stuff like sofa or mattress. Since it consists of the digested blood, its color is dark red or black.
Bed bug fecal matter is dark in color made up of digested blood from their host. Bed bug feces is smooth to the touch unlike roach feces, which is more granular in feel. The fecal matter is easy to smear and can quickly stain mattresses, sheets, drapes, furniture, sofas and chairs. Below are some bed bug feces pictures.