The short answer
Not usually. A single bed bug feeds for a few minutes and then hides for several days while it digests, so one bug does not bite every night. But an infestation has bugs at different stages feeding on different nights, so as numbers grow the bites tend to become nightly. A few nights without bites does not mean they have gone.
People often notice a pattern: three nights of bites, then a quiet spell, then more. It is tempting to read a quiet spell as good news. Usually it is not. Here is how bed bug feeding actually works and what the pattern of your bites can and cannot tell you.
How often one bed bug feeds
A bed bug needs a blood meal to grow and to lay eggs. When it feeds, it takes several minutes, filling up until its body is swollen. Then it crawls back into a crack or seam and stays there while it digests.
Public health guidance, such as the Virginia Department of Health’s bed bug biology sheet, describes bed bugs feeding every few days to a week or so when a host is available. So one individual bug does not bite you every night. It may come back three, five or seven nights later.
Young bugs feed too
Each of the five young stages needs a feed before it can shed its skin and move on to the next. That means a growing population is not only adults; it is lots of smaller bugs, each on its own feeding schedule.
Why bites seem to come in waves
With only a few bugs in the room, their feeding nights may happen to line up, then not. That produces the stop-start pattern many people describe. As the number of bugs grows, there are more of them on different schedules, so someone is feeding most nights and the bites become nightly.
A gap of a few nights is therefore normal in an early infestation. It does not show that the bugs have died or moved away. They are still nearby, digesting.
Why you get bitten and your partner does not
This one causes a lot of worry. Two people share a bed and only one wakes up with marks. There are two likely reasons.
- Different reactions. Plenty of people show no marks from bed bug bites, and some only start reacting after being bitten for a while. The bugs may be feeding on both of you, but only one of you shows it.
- Position in the bed. Bugs come from where they hide. If they are in the frame or the wall on one side, the person on that side tends to be bitten first.
Either way, if one person in a bed has bed bug bites, the bed is the problem, not the person.
Do bed bugs bite in the day?
They prefer the dark hours before dawn, when people are still and asleep. But hungry bugs will feed in the daytime if someone is lying still, for example a night-shift worker sleeping in the day, or someone resting on a sofa. Bites that appear after a daytime nap on the settee are worth taking seriously.
What the bites look like
The NHS describes bed bug bites as itchy, often in lines or groups, usually on skin left uncovered in bed, such as the face, neck, arms and hands. They can look like other insect bites and do not have a mark that proves they came from bed bugs. That is why physical evidence, such as droppings, skins or the bugs themselves, matters more than the bites.
What happens if you leave it
Bed bugs do not go away on their own while someone is sleeping in the room. They can survive for long periods between feeds, so leaving a room empty for a short time does not starve them out either. Over weeks, the number of bugs grows, they spread to other furniture and rooms, and treatment becomes bigger and more expensive.
In Newcastle’s Tyneside flats and shared houses, waiting also makes it more likely the bugs reach the neighbours or housemates. That is where a small job becomes a whole-house one.
What to do now
- Keep a short note of when and where the bites appear. It helps the technician.
- Look for evidence: black dots on seams, pale skins, eggs or the bugs. Our guide on what bed bugs look like shows what to look for.
- Keep sleeping in the same bed, so the bugs stay in one place.
- Wash and tumble dry bedding hot, as the NHS suggests, and bag clean items.
- Get it treated. A spray course takes two or three visits because eggs hatch after the first; heat usually takes one. Compare them on our price guide.
If you rent from the council, report it to your housing office. Newcastle City Council does not list a bed bug service for private homes, so owners and private tenants usually need a private firm; check with the council or your landlord if you are unsure.
If the bites keep coming, send us your postcode. We look for a Newcastle firm that covers your area, then tell you who they are before your details go anywhere.