Bed bug droppings appear as tiny black or dark brown spots, often resembling ink marks or pepper specks. They are commonly found on mattresses, bed frames, sheets, and furniture seams. These droppings are made of digested blood. When wiped with a damp cloth, they usually smear or bleed. Their presence is a strong sign of an active bed bug infestation. Read more - https://bugbustergoldcoast.com.au/what-do-bed-bug-droppings-look-like/