What Do Bed Bugs Look Like?

Meta Description: Learn how to spot bed bugs at every stage, from eggs to adults.

What Do Bed Bugs Look Like?

Bed bugs are tiny, flat bugs that change in size and color as they grow. Adult bed bugs are brown and about the size of an apple seed, while younger ones are smaller and lighter. Their eggs are super tiny and white.

It’s important to know what you’re looking at, since other bugs can look pretty similar.

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[Bed bug life stages]

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Quick Answer

– Adults: Brown, flat, oval, 5–7 mm
– Fed adults: Reddish, swollen
– Nymphs: Smaller, lighter
– New nymphs: Almost see-through
– Eggs: Tiny, white

Adult Bed Bugs

Adult bed bugs are flat, brown, and don’t have wings. They have six legs and two antennae, and they’re about 5–7 mm long. Because they’re so flat, they can squeeze into tiny cracks and hide easily.

After Feeding

After they feed, bed bugs get bigger, more stretched out, and turn a reddish color.

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[FED AND UNFED COMPARISON]

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Nymphs

Nymphs are basically baby bed bugs. They look like smaller versions of adults but are lighter in color and harder to spot. They go through five stages, getting bigger each time they feed.

Eggs

Bed bug eggs are about 1 mm long, white, and usually tucked away in hidden spots like seams or cracks.

Shed Skins

As they grow, bed bugs shed their skins. These look like pale, empty shells and are often found near where they hide.

Can You See Them?

Yes, you can see them, but eggs and young nymphs can be tricky to spot. A flashlight or magnifying glass can help.

Look-Alikes

Some bugs that people often confuse with bed bugs include carpet beetles, fleas, cockroach nymphs, spider beetles, and bat bugs.

Where to Check

Check around places where people sleep:

– Mattress seams
– Bed frames
– Headboards
– Furniture joints

Are Bites Enough?

Nope. You can’t confirm bed bugs just from bites alone.

What to Do

If you think you’ve found one:

1. Take a photo
2. Try to capture it
3. Check nearby areas
4. Get it identified by an expert

Common Mistakes

– Judging by color alone
– Assuming they’re all adult size
– Relying only on bites

Final Takeaway

Bed bugs look different depending on their stage:

– Eggs: tiny and white
– Nymphs: small and light
– Adults: brown and flat
– Fed adults: swollen and reddish

To be sure, look at both their appearance and other signs—not just bites.

Notice

This article is for general information only.

URL Slug: “what-do-bed-bugs-look-like”

Last reviewed: July 2026

Sources

– U.S. EPA
– University of Minnesota Extension