As temperatures cool off, mosquito season is winding down — but bed bug calls in Montreal are still climbing. Both bites can look similar at first glance: red, itchy, and annoying. But the pattern, timing, and location on your body usually give away which one you’re actually dealing with.
Look at the pattern
Mosquito bites tend to show up as isolated, random spots — wherever skin was exposed. Bed bug bites are different: they often appear in a line or small cluster of three or four, sometimes nicknamed “breakfast, lunch, and dinner,” because bed bugs feed multiple times in one session as they move along the skin.
Check where the bites are
Mosquitoes bite anywhere exposed — arms, legs, ankles, neck. Bed bugs feed at night while you sleep, so their bites cluster on areas that touch the bed: arms, shoulders, back, and legs that were uncovered under the sheets.
Think about timing
A mosquito bite usually swells and itches within minutes. Bed bug bites are sneakier — they can take anywhere from a few hours to two weeks to show up, which is part of why people often don’t connect the dots right away.
Look for other clues
If it’s bed bugs, the bites usually aren’t traveling alone. Check your mattress seams and box spring corners for small rust-colored stains, dark spotting, or shed skins — signs mosquitoes never leave behind.
When to stop guessing and call someone
A few isolated bites after a night on the patio are probably mosquitoes. But a cluster of bites in a line, especially if they showed up after a trip or a used furniture delivery, is worth a closer look. Optima Extermination offers free inspections across Greater Montreal and can confirm what you’re dealing with before it spreads — read more about our bed bug removal or book a free inspection.