What is a notable symptom of a bed bug infestation?

A notable symptom of a bed bug infestation is the presence of black or brown spots on linens. These spots are typically identified as fecal matter left behind by the bed bugs after they feed on blood. This waste can appear as small, dark specks and is often found on bedding, mattress seams, and other areas where bed bugs tend to hide. Recognizing these marks is crucial for diagnosing an infestation since bed bugs are notoriously elusive and can be challenging to spot directly. Observing these signs can prompt a thorough inspection and the appropriate measures to eradicate the pests from the living environment.