Bites alone cannot confirm the cause
Skin marks can have several causes, and people react differently. Do not diagnose bed bugs solely from the appearance or arrangement of bites.
Look for environmental evidence
Inspect mattress seams, bedding and bed-frame joints for signs that can be photographed for identification. A pest professional can assess the sleeping area and advise on next steps.
Use medical advice for symptoms
The NHS provides information about bedbugs and insect bites. Speak with an appropriate healthcare professional if symptoms concern you. Pest identification and healthcare are separate assessments.
Related pest guides
Rats & Mice
Recognise rodent signs and understand inspection, treatment and proofing.
Read guide
Bed Bugs
Check bedding and furniture signs, preparation and follow-up questions.
Read guide
Cockroaches
Identify kitchen activity and understand monitoring and prevention.
Read guide
Wasps
Assess a suspected nest safely and prepare for professional identification.
Read guideFurther information
- NHS: bedbugs and bites
- Government: renting a safe home
- British Pest Control Association: pest advice
- Find your local council
- Safer food, better business for caterers (FSA)
- HSE: rodenticides
Published by Pest Protect London. Updated 9 September 2026. General information; treatment decisions require an assessment of the property. Editorial policy.