Bed bugs turn up in hotels, hostels, guesthouses and sleeper trains in Thailand, as they do everywhere travelers sleep. They are a nuisance rather than a danger: the US Centers for Disease Control and Prevention (CDC) says they are not known to spread disease. Check the bed when you arrive, ask for another room if you find them, and treat your luggage before you take it home.
Bed bugs have nothing to do with how clean a place is. The CDC says they are found in five-star hotels and resorts as well as cheap rooms, because they travel in luggage, folded clothes and bedding from one guest to the next. A good review score does not rule them out, and finding one does not mean the hotel is dirty, only that it needs to act.
This page covers checking a room, telling the bites apart from other bites, looking after the skin and keeping the bugs out of your bag. It is general information from the CDC and the UK's National Health Service (NHS), not a diagnosis; if a bite worries you, see a pharmacist or a doctor.
Bed bugs in brief (CDC and NHS, checked October 2026)
- Size and look
- Adults about 5 mm, roughly the size of an apple seed; flat, reddish-brown, no wings
- Where they hide
- Mattress seams, sheet folds, the bed frame and headboard, luggage and folded clothes
- Disease
- Not known to spread disease to people (CDC)
- Bites
- Often in a line or a group on skin left bare in bed; can appear a day to several days later
- Usual course
- Bites usually clear in about a week (NHS)
- In your clothes
- Hot wash at 60 °C and at least 30 minutes in a hot dryer, or bag and freeze for 2–3 weeks (NHS)
Checking the bed before you unpack
Do the check before your bag goes on the bed or the floor. Put it in the bathroom or on a hard luggage rack while you look. It takes five minutes, and it is much easier to change rooms at check-in than at midnight.
- Pull back the sheet at the head of the bed and look along the seams and piping of the mattress, especially at the corners.
- Look for the signs the CDC lists: the bugs themselves, small rusty or dark spots of dried blood on the sheet or mattress, and pale empty skins that the bugs shed as they grow.
- Check the folds of the sheets and pillowcases, the edge of the headboard and any gaps in the bed frame. A phone torch helps.
- In a hostel dorm, check your own bunk and the one above or below it, since the bugs move along the frame.
Thai hostels, guesthouses and overnight transport all have shared bedding, and the CDC names hotels, buses, trains and dormitories among the places infestations occur. On a sleeper train or overnight bus, keep your bag closed and off the seat where you can. Our guide to hostels in Thailand covers choosing one, and the page on night trains describes the berths.
Bed bug bites or mosquito bites?
You often cannot tell from a single bite, and the CDC notes that the marks can take from one day to several days to appear, up to 14 days in some people. Bed bugs also bite without waking you. So the pattern and the timing tell you more than the bite itself.
| Clue | Points to bed bugs | Points to something else |
|---|---|---|
| Where on the body | Skin left uncovered in bed: face, neck, arms (NHS) | Ankles and legs after an evening outdoors |
| Pattern | A line or a tight group of bites (CDC, NHS) | Scattered single bites |
| Evidence in the room | Blood spots, shed skins or bugs in the mattress seams | Nothing in the bed, mosquitoes in the room |
Mosquitoes matter more in Thailand, because they carry dengue. If you are being bitten by them, our article on avoiding mosquito bites is the page to read. Heat rash can also look like small red bumps; the guide to skin rashes and infections describes it.
Looking after the bites
The CDC says bed bug bites usually need no medical treatment. The NHS suggests a cool, damp cloth to ease the itching and, above all, not scratching. In a hot, humid climate a scratched bite can become infected, which is the main real risk.
A pharmacist can suggest a mild steroid cream or an antihistamine for the itching, according to the NHS, which adds that children under 10 and pregnant women should ask a doctor before using hydrocortisone cream. The CDC also mentions antiseptic creams. Follow the pack or the pharmacist on how to use them. Our older article on what Thai pharmacies sell without a prescription explains how they work, and the page on late-night pharmacies helps if the itching keeps you awake.
See a doctor if the redness spreads or you feel unwell. The NHS says to get medical help if pain or swelling around the bites spreads, which can mean an infection. Swelling of the face, lips or throat, or trouble breathing, is an emergency: call 1669. The CDC says to see a healthcare provider for any allergic reaction.
For a severe allergy, our page on traveling with a severe allergy covers hospitals and what to carry, and the hospital guide explains how payment works if you need a doctor. The UK government notes that Thailand has no reciprocal healthcare agreement with the UK, so you or your insurer pay for any treatment.
Asking for another room
Go to reception straight away, calmly, and show what you found: a photo of the mattress seam or the bug, or the bites. Ask for a different room, and say why, so that the hotel deals with the original one. The CDC says an infestation needs professional pest control, which is the hotel's job, not yours.
Take photos with the time on them and keep your booking confirmation. If the hotel will not move you or refund the night, the next steps are the same as for any dispute with a business: a written complaint to the manager first, then the booking platform or your card issuer. Our guide to consumer complaints in Thailand sets out those routes and the public hotlines.
Before you move rooms, check your bag. If it sat on the bed or the floor, treat it as possibly carrying bugs, and do not unpack it in the new room until you have looked through the seams and folds.
Not taking them home
Bed bugs travel in luggage, so the last night of a trip matters. The NHS gives two ways to kill them in clothes and belongings:
- Heat: wash at 60 °C, then tumble-dry on a hot setting for at least 30 minutes.
- Cold: seal items in a bag and put them in a freezer for two to three weeks.
In Thailand the easiest version is a laundry shop or hotel laundry before you fly. Ask for a hot wash and a hot dry rather than the standard program; at self-service laundromats hot water usually costs extra, as our guide to laundry in Thailand explains. Pack the clean clothes in sealed plastic bags.
At home, the NHS advises checking luggage and clothes before you bring them indoors if you have stayed somewhere with bed bugs. Unpack on a hard floor, not on the bed, wash everything you can, and vacuum or inspect the seams of the suitcase.
Living in Thailand: bed bugs at home
If you rent long term and find bed bugs in your own bed, they most likely arrived in luggage, clothes or bedding, the routes the CDC describes. The same CDC advice applies: an infestation needs a professional pest-control service. Our guide to household pests covers ants, cockroaches and termites and explains what a pest-control contract usually includes; ask your landlord who pays before you book anyone.
We found no fact sheet on bed bugs from Thailand's Department of Disease Control and no Thai statistics on how common they are, so this page relies on the CDC and the NHS.
Frequently asked questions
Are bed bugs common in Thai hotels?
There are no official Thai figures, so nobody can say how common they are. The CDC says bed bugs are found worldwide, including in five-star hotels, and that cleanliness does not decide whether they are present. Check the bed in any room, whatever it costs.
Do bed bugs spread disease?
No disease spread to people is known, according to the CDC. The problems are itching, lost sleep and, rarely, an allergic reaction. Scratching the bites open in the heat can lead to a skin infection, which is why you should leave them alone.
How long do bed bug bites last?
The NHS says they usually clear up in about a week. See a pharmacist for the itching, and a doctor if the pain or swelling spreads, if the area becomes hot and painful, or if you have any sign of an allergic reaction.
How do I make sure I don't bring bed bugs home?
Wash clothes at 60 °C and dry them on a hot setting for at least 30 minutes, or seal and freeze them for two to three weeks, as the NHS advises. Check the seams of your luggage and unpack on a hard floor, away from beds.
Sources
- US Centers for Disease Control and Prevention – About bed bugs (last reviewed 26 April 2024) (checked October 2026)
- NHS – Bedbugs (last reviewed 1 May 2026) (checked October 2026)
- UK Government – Healthcare and medical services in Thailand (checked October 2026)