Bloodstain (likely from a bed bug or crushed insect)

Typically found on mattresses, bedding, upholstered furniture, and within wall crevices in indoor human dwellings.

Obligate hematophages, meaning they feed exclusively on the blood of warm-blooded animals, primarily humans.

Nocturnal and elusive; they hide during the day and emerge at night to feed. A small smear often indicates a bug was crushed after feeding or that fecal matter was deposited.

While not known to transmit diseases, their bites cause itching, allergic reactions, and psychological distress. They are considered a significant pest requiring professional eradication.