Small, itchy bites on exposed skin, often in lines or clusters
Red, swollen welts that appear after sleeping
Tiny blood spots on sheets, pillowcases, or pajamas
Dark brown or black fecal spots on mattresses, bedding, or nearby furniture
Shed skins or pale yellow exoskeletons near mattress seams, bed frames, or baseboards
Live bugs hiding in mattress seams, box springs, headboards, cracks, or crevices
A sweet, musty odor in heavily infested areas
Rust-colored stains on bedding from crushed bugs
Bites that appear after staying in a hotel, dorm, or used furniture area
Multiple household members waking up with new bites
Itching or skin irritation that worsens overnight or in the morning