1. Bed Bug Bites

Bites are the most commonly reported sign of a bed bug infestation. Bed bug bites often appear in zigzag lines or straight rows on exposed skin, leaving behind red, itchy welts. These creatures are nocturnal, so you’ll most likely notice the bites in the morning after a night’s rest. Anytime you wake up with red welts, you’ll want to check for bed bugs immediately.

2. You Spot Them

Bed bug eggs, nymphs, and adults are all visible to the human eye. Fully-grown, bed bugs are about the size of a lentil and can double in size after feeding. These pests are often found in couches and bed frames, but they might also show up in stuffed animals, purses, suitcases, shoes, curtains, carpeting, and even items like bedside lamps. If their food source is nearby, they’re likely hiding within close proximity.

3. Brown or Reddish Spots

Additionally, bed bugs will leave behind small brownish or reddish dots on bed linens and mattresses. These spots are actually tiny blood stains. You might also notice a musty odor like that of a wet towel. This strong scent is caused by bed bug pheromones.