The answer to 'why is my bed bug droppings' is that bed bug droppings are a clear sign of a bed bug infestation in your home. Bed bugs feed on human blood and leave behind small, dark spots or stains as they digest their meals. These droppings are often the first visible sign that you have a bed bug problem.
Bed bug droppings are typically found in cracks and crevices around your bed, on the mattress or box spring, or in other areas where bed bugs hide during the day. The droppings may look like small black or brown spots, or they can appear as streaks or smears. Over time, the droppings can build up and become more noticeable.