Short answer
One bed bug does not always mean an infestation, but it is a strong warning. Catch it, check the bed and the area around it carefully tonight, and if you find spotting, eggs or more bugs, or start getting bites, arrange an inspection quickly while it is still small.
Contents
Finding a single bed bug, on a pillow, a wall or a suitcase, is unsettling. The good news is that one bug, caught early, is the cheapest point at which to deal with the problem. This guide covers what it is likely to mean and what to do in the next 24 hours.
First, make sure it is a bed bug
Several insects get mistaken for bed bugs. The NHS describes adult bed bugs as flat, oval and brown, about the size of an apple seed, and redder and rounder after feeding. Young ones are smaller and paler.
Common lookalikes include carpet beetle larvae (hairy and stripy), booklice (tiny and pale), spider beetles (round and shiny) and bat bugs, which are very rare in homes. If you can, catch the insect, put it in a sealed bag or small jar, and keep it. A specialist can identify it in seconds.
What one bug might mean
There are three common explanations:
- A hitchhiker. It came in on luggage, a bag or a coat and has not settled yet. This is most likely after a trip or a hotel stay.
- The start of an infestation. A single fertilised female can begin one. In the first few weeks there may be only a few bugs and eggs, usually close to the bed.
- A visible sign of a bigger problem. Bugs are mostly hidden in the day. Seeing one in daylight can mean there are more nearby.
You cannot tell which from the single bug alone. The next step is a careful check.
How to check tonight
Take a torch and a card or old credit card, and work outwards from where you sleep:
- Mattress seams and piping. Run the card along every seam, label and corner. Look for black dots like felt-tip marks, pale empty skins and tiny white eggs.
- The bed base and frame. Lift the mattress. Check divan corners, slats, screw holes and joints.
- The headboard. Especially the back of it and where it meets the wall.
- Within a couple of metres. Skirting boards, carpet edges, bedside tables, sockets and the backs of picture frames.
- Sofas and chairs. If anyone sleeps or naps on them.
The British Pest Control Association notes that the edge of the mattress nearest the wall is often where the first signs appear.
If you find nothing else
Keep the bug, and keep watching for a couple of weeks. Wash and tumble dry the bedding on hot. Vacuum the mattress seams and around the bed, and empty the vacuum into a sealed bag outside. If you have been travelling, wash everything from the suitcase and vacuum the case itself.
If no bites, spots or further bugs appear in two or three weeks, it was probably a hitchhiker.
If you find more signs, or get bites
Arrange an inspection now rather than waiting. A small, early infestation might mean one room and a lower price, typically £350 to £550 for a single room by spray as a guide, against several hundred more for a whole flat later. Our price calculator shows the range.
If you rent, tell your landlord or letting agent in writing first, with photos and the date.
What not to do
- Do not spray it with a shop insecticide. It will not reach bugs in the bed frame and may drive them to other rooms.
- Do not throw out the mattress yet. It may be treatable, and carrying it through the building can spread bugs.
- Do not move to the sofa. Bugs follow people, and you would carry them to a second room.
When to call a specialist
Book an inspection if you find any spotting, eggs or more bugs, start waking with bites in lines or clusters, live in a flat or shared house where others have had bites, or simply want to be sure. Many firms take the inspection fee off the treatment if you go ahead.