Can you see bed bugs with the naked eye?

Yes, you can see bed bugs with the naked eye because adult bed bugs are small but visible, though eggs and young nymphs are very tiny and harder to see without magnifying glass. Adult bed bugs are flat, oval, reddish-brown insects about the size of an apple seed, approximately 4 to 7 millimeters long, which is large enough to see on mattress seams, sheets, and headboards, especially after they have fed and are engorged with blood, appearing darker red and more swollen. Nymphs or young bed bugs are smaller, about 1 to 4 millimeters, pale yellow to light brown, and translucent, making them harder to spot, especially first instar nymphs that are about 1.5 millimeters and nearly colorless. Eggs are tiny, white, about 1 millimeter long, like grain of rice, and are often hidden in cracks and crevices, difficult to see without magnifying glass. You can see signs like dark fecal spots that look like ink dots, rust-colored stains from crushed bugs on sheets, and translucent shed skins. To see bed bugs, inspect with flashlight at night between 2 AM and 5 AM when they are most active, checking mattress seams, box spring edges, headboard joints, and behind baseboards. Interceptor traps under bed legs can catch bugs for viewing. While adults are visible, thorough inspection with flashlight and magnifying glass helps find all life stages.