When you are facing a bed bug infestation, you might see bed bugs themselves, their shed skins, or even their droppings in the mattress seams or on other items in your space. In addition to this, you might also see blood stains on sheets or your mattress.
The smell in your room might be sweet and musty, and you might encounter some exoskeletons that have been shed from the bugs. Regardless of the signs, it is important to identify them and act quickly to prevent further infestation.