What Do Bed Bug Bites Look Like? How to Identify Them

One of the first signs people notice when they have bed bugs is unexplained bites on their skin. But bed bug bites can be easy to confuse with bites from other insects, or even with skin conditions like eczema or heat rash. Here’s how to tell the difference — and what to do if you think bed bugs are to blame.

Bed bug bites typically appear as small, red, raised welts on the skin. They’re usually flat or slightly swollen and can be intensely itchy. The key characteristics to look for:

• Appearance: Small red bumps or welts, sometimes with a darker red spot in the centre
• Pattern: Often appear in a line, curve, or cluster of three — sometimes called “breakfast, lunch and dinner”
• Location: Usually on exposed skin during sleep — arms, shoulders, neck, face, hands, and legs
• Timing: Bites are typically noticed in the morning, having occurred overnight
• Reaction: Can range from barely noticeable to intensely itchy and swollen, depending on the person

Important: Around 30% of people show no visible reaction to bed bug bites at all. The absence of bites does not mean the absence of bed bugs.

Bed bugs inject a mild anaesthetic when they feed, so you won’t feel the bite happening. The itching and inflammation develop later as your body reacts to proteins in the bed bug’s saliva. The reaction can appear anywhere from a few hours to a few days after the bite — which makes it harder to pinpoint the cause.

Most bites clear up on their own within one to two weeks. Antihistamine tablets or hydrocortisone cream can help with itching. Avoid scratching, as this can lead to secondary skin infections.

In most cases, bed bug bites cause nothing more than temporary skin irritation and discomfort. They do not transmit diseases. However, there are some situations where medical attention is appropriate:

• Signs of an allergic reaction (significant swelling, hives, difficulty breathing)
• Signs of skin infection from scratching (increasing redness, warmth, pus)
• Significant anxiety or sleep disruption caused by the infestation

Bites alone are not enough to confirm a bed bug infestation. You need to look for physical evidence in your bedroom. Check your mattress seams, the back of your headboard, bedside furniture, and skirting boards for:

• Live bugs (small, flat, reddish-brown, apple-seed sized)
• Dark brown spots (excrement)
• Bloodstains on bedding
• Shed skins or tiny white eggs

If you find any of these signs alongside unexplained bites, it’s very likely you have bed bugs. Contact a professional pest controller straight away — the sooner you act, the easier the infestation is to clear.