Bed bug bites: what they look like and what to do

Bed bug bites are often the first thing that makes someone suspect a problem — but they are also one of the least reliable ways to confirm it. Here is what the bites typically look like, how to tell them apart from other insect bites, how to ease the itch, and why you should always look for physical evidence before assuming the worst.

What bed bug bites look like

Bed bug bites usually appear as small, raised, red bumps, often with a darker red centre. They tend to be itchy and can take a day or more to show up after you’ve been bitten. They most often appear on skin that is exposed while you sleep — the face, neck, arms, hands and shoulders.

The tell-tale pattern

The classic clue is the arrangement: bed bug bites frequently appear in a rough line or a small cluster, sometimes described as "breakfast, lunch and dinner", because a disturbed bug may bite several times in a row as it moves. A line of three or four bites on an exposed area is suggestive of bed bugs — though it is not proof.

Reactions vary enormously

People react very differently to bed bug bites. Around a third of people show no visible reaction at all, which is one reason infestations can go undetected for so long. Others develop pronounced, very itchy welts. Two people sharing the same bed can have completely different experiences — so the absence of bites on one person does not mean there are no bed bugs.

Bed bugs, fleas or mosquitoes?

• Bed bugs — bites on exposed upper-body skin, often in a line or cluster, appearing overnight
• Fleas — usually around the ankles and lower legs, often with a small red centre; more likely if you have pets
• Mosquitoes — tend to be more random and single, itch immediately, and are more common in warmer months or near standing water

How to soothe bed bug bites

Bed bug bites generally clear up on their own within a week or two. Try not to scratch, as broken skin can become infected. Keeping the area clean, applying a cool compress, and using an over-the-counter antihistamine or mild soothing cream can help with the itch. If bites become very swollen, painful, infected, or you have a severe reaction, speak to a pharmacist or your GP.

Don’t rely on bites alone — check for evidence

Before you assume you have an infestation, inspect your mattress seams, bed frame and headboard for the real signs: dark spots, rusty blood smears, pale shed skins and live insects. Our guide to spotting the signs walks through exactly what to look for and where.

If you confirm bed bugs

Once you’ve found physical evidence, the next step is professional treatment — shop-bought sprays rarely clear an established infestation. Use our free matching service to get connected with a vetted local specialist who can treat it properly and get your home back.