- Pattern: bed bug bites often appear in a line or cluster of three to five. Mosquito bites are scattered.
- Location: bed bugs bite skin touching the mattress, such as shoulders, arms and back.
- Evidence: check mattress seams and the headboard for rusty spots, tiny eggs or live bugs.
- Timing: bites that keep appearing after a night indoors with windows closed point to bed bugs.
Bed bugs do not go away on their own. Treat every bed and sofa in the home at the same time.