Chris hates spiders. I hate cockroaches. So before we moved to Thailand, we never believed that one day we would actually live in harmony with these creatures. Not go into a kung fu frenzy at the sight of one, you say? Since having our fair share of surprise encounters with them over the past two years, we’ve learned how to handle Thailand’s bugs and other creepy crawlies without getting too freaked out!
We love that Thailand has a warm and tropical climate. We love that Thai businesses are, more often than not, open aired. We love outside dining and enjoying a good meal or a cup of coffee under the shade of a few trees. We love the simplicity and quaintness of Thai styled teak houses.
But with all that comes a very inviting environment for Thailand’s bugs. This includes things that fly, creep, and jump. We’ll even throw in four-legged creatures that skitter around in the night.
Ants

After living in Thailand for just shy of two years, ants are by far the thing that gives us the biggest heartache.
In our first studio apartment, we couldn’t get them rid of them. We’d empty the trash daily. We’d wiped down counters and do dishes immediately. We even started putting our dry goods, like oatmeal, sugar, and noodles in zip-lock bags, but the ants would chew through the plastic and get in anyways.
The ants even went so far as to eat our toothpaste. They’d march from these little cracks in our bathroom walls and ceiling, up the sinks, and weasel their way under the toothpaste cap. It was disgusting.

Also, ants give nasty bites! I found welts the size of silver dollars on my body that stayed blotchy and itchy for about a week, and it wasn’t from some mutant mosquito. Who knew a tiny thing could do so much damage?!
Cockroaches
Big ones and small ones. Daytime and nighttime. These things are afraid of nobody!
Luckily, almost every roach we’ve seen has been (thankfully) outside and either digging in the roadside trash or cruising along the sidewalk. It’s usually just one lone rider, but more often than not, it measures over two inches long!
Spiders

We see small spiders from time to time, and admittedly, we think our cat properly disposes of them at night or while we are away.
But let’s just say that we were never ready for the type of spiders we had in our old townhouse. They were sporting a wingspan of nearly three inches and were lightning fast.
We killed (dog eat dog world, we know) several of these gigantic grey spiders in just one month during what we assumed to be spider season back in our old townhouse.
We’ve used roach spray to stun one into submission before whacking it with a broom.
Another time, I was putting in my contacts and saw a spider splayed on the wall less than a foot away from my cheek. I flung my contact across the bathroom out of surprise, but managed to grab something to squish it before it skittered off.
The worst experience was finding one of these spiders on top of our bed. Now we’re in a predicament; we didn’t want to squish it on the pillows or blankets, but we didn’t want to risk losing it in the bed frame, either. The bed frame was a big box on the floor with enough wooden slats supporting the mattress that you could barely fit your fingers between them.
Unfortunately, the latter happened, and it was right before bedtime.
We know what you’re thinking. Did you go to bed knowing the spider was in the bed frame somewhere? Yes, why yes we did. We had the heebie jeebies but we just couldn’t do anything about it. That’s ok. Two days later, that spider got what it deserved.
Millipedes

We’ve seen some mighty millipedes in Thailand. These guys get several inches long and are as thick as a pinky finger, but we’re happy to report that they seem to mind their own business. We’ve only ever seen them outside and hope to keep it that way. Sealing our doors has prevented any millipedes from wandering into our house and being eaten by the cat.
Mosquitoes
Mosquitoes are present year round but in varying degrees. There are more in the wet season (July to October) and fewer in the dry hot season (March to June). They love cool dark places, like your typical jungle and shady outdoorsy areas. But this also includes underneath restaurant tables and in bathrooms, which give the perfect opportunity for biting fleshy areas.
A word of caution, Thailand’s mosquitoes can carry Malaria and Dengue Fever. Although there are preventative pills that can be taken for Malaria and often used by tourists, these are not a long-term solution for people living here. There are no vaccines against these diseases. However, symptom for Malaria and Dengue Fever are treatable (lots of fluids and pain killers) at the local hospitals.
Frogs
We haven’t seen too many frogs in Thailand, but at our old house during the rainy season, we had a week or two of frog plagues, which we captured in a time-lapse video. Hundreds of these miniature buggars hopped out of the temporary pond in our side yard and made our patio area their home!
We’ve also rescued our neighbor and her sister from a frog in their house. They were terrified of a palm-sized frog that was sticking to their living room wall, so we knocked it off with a broom and put it back outside where it belonged.
Lizards
We have two types of lizards that frequent our house and surrounding yard. The locals call them jing joke and dtook gae, but we call them geckos and f%@k you lizards. The latter has been given this nickname by foreigners who believe the lizards’ call sounds much like said expletive.
The geckos frequent our home and hang out on the ceilings. They seem harmless, make cute little chirps, and supposedly eat mosquitoes. They’re good guys, so we don’t bother them. On the other hand, our cat goes full hunt mode when they’re around.
The other lizards look like small iguanas and can be aggressive. We’ve known someone whose large dog tried to mess with one and got a nasty bite on the nose that required a visit to the vet and antibiotics. Don’t mess with these guys!
So How Do You Get Rid of Thailand’s Bugs?
There are several preventive measures you can take against Thailand’s bugs, as well as ways to get rid of them once they’re inside the house.
Something as simple as sealing the gaps between the doors and the floor prevents larger bugs and other critters from getting inside. Thai houses aren’t typically built to Western standards and are rather, um, breezy. We found door seal strips (weathering strips) at our local HomePro, a home improvement store. You may also have luck at the big department stores, like Big C or Tesco Lotus.
Using caulk to patch up small cracks will also help prevent smaller bugs, like ants, from coming inside.
Ant chalk also works fairy well, although it needs to be applied often. Draw lines around door and window frames, electrical sockets, and pipes using this special chalk. It has a neurotoxin that interferes with the ants’ ability to track food sources and follow scent trails. It also kills those that are exposed.
Other tips including cleaning up immediately after cooking. Rinse dishes before putting them in the sink and wipe the counters to get rid of small spills and crumbs. Also, put dry goods into tupperware or glass containers.
As far as spiders and roaches are concerned, they either get a blast from insect spray or they’re electrocuted the electric bug zapper racket. The latter is also fantastic for killing mosquitoes. And can we all admit how fun it is to hear the rapid pop-pop-pops when you’ve successfully killed them? These items are available at 7-Elevens, Mini Tesco Lotuses, and those little dollar store equivalents around town.
Wear long sleeve pants and shirts, weather permitting, in the evenings and mornings. Even wearing full coverage shoes, and not flip-flops, can make a big difference.
Use mosquito repellent. 7-Elevens and Mini Tescos, which are scattered across every block in Thailand, sell sprays and lotions. They smell a lot better than the stuff that contains Deet, too.
Lastly, sit in front of a fan. Many cafés and restaurants have fans on, and the moving air physically prevents mosquitoes from getting to you.
Thailand’s Bugs Don’t Stop There
We’ve also had a brief encounter with a dead scorpion in our bathroom drain, had an infestation of these weird grey worm pods on our walls, witnessed several plagues of flying termites, dealt with ticks, and have seen plenty rats. Snakes? Nope, we haven’t seen a snake yet.
We’ve since gotten used to Thailand’s bugs. Well, as much as one can get used to things that swarm, bite, jump, and fly. Would you be able to do the same?

Hello. I’m a hobby Myrmecologist (study of ants) and have lived here in Thailand for 10 years now. From experience and study I would say the saying “if you can’t beat em join em” applies to our ant friends. The best thing one can do to keep ants out of his/her place is to feed the ants outside of the residence. A small container with a tiny hole in the top will do. Put some honey in the container. Place a chopstick in the hole to the container bottom. Anchor the chopstick against a wall, potted plant, etc. Basically your… Read more »
Great comment! Thanks for sharing these tips to keep ants from looking for food and nesting in homes.
Hello Chris and Angela, I LOVE your blog! It is extremely helpful. On the subject of bugs, I am terrified of them. Like every big you can think of I am scared (even butterflies). You are probably wondering why I would consider Thailand then. My fiance has been numerous times and he has really sold the cheap lifestyle there to me and I think I would like it too, but there is that one problem. BUGS. I think he isn’t 100% being honest about how bad the situation may be there. So I thought I would ask you! I believe… Read more »
The number of bugs inside your house depends on if there is an infestation on the property and how well your house is sealed.
Our house in Chiang Mai has a huge ant hill in the backyard a few meters from our backdoor and they find their way inside. However, every few months we put out ant poison and it wipes them out completely. This works! You can buy the ant poison granules from 7-11 and mini Tescos. Good luck!
Hi, I need help for bedbugs. I know to wash and dry at particular temperatures and length of time to kill them in my clothes. I need to know where I can buy pesticide to spray my backpack, and which type of pesticide is effective. Can you guys help ?
Thanks.
That we can’t! But we recommend going to a Big C or Tesco and check out the pesticides. Wish we could have been more help.
Hello Friends, As I plan for my visit I’ve heard that food grade Dicameous Earth is sure to support keeping pests away (rubbing on the family kitten, spreading in cabinets and along floor corners and window sills… even under clean bed sheets to handle potential bed bugs / etc). Have either of you tried this yet? They sell it in Chiang Mai, but I haven’t seen any expat tips recommending it yet. They say mixing a little in the cats food is not only healthy, but treats his stools so it won’t attract pests as well. They, also, encourage that… Read more »
Diatomaceous Earth? Never heard of it! How interesting… worth looking into if Chiang Mai has stores that sell it.
The best defense for these critters is to stay in a home that is properly sealed (windows, screens, doors, roofs, etc). It makes a world of a difference if you stay in a Western style house vs Thai style (open to the elements). Home you make the leap soon!
Hi gf and i are moving to chiang dao later .. currently in chiang mai ….
and i found this interesting .. now as to the diatomaceous earth .. i used this as the filtering agent in my swimming pool, filter and pump .. so how the heck does it figure into pest removal ?? ..
We haven’t used it ourselves but supposedly diatomaceous earth is very effective at killing insects who eat the dry grains. If you can find it, it’d be worth trying out.
Hi, I’ve used that in London to kill bed bugs. It’s good stuff. But it’s messy if you have it everywhere. Personally the bugs thing in Thailand. Not every home gets a lot of ants. It’s varied wherever I have stayed. I take zyrtec for mosquitoes but that’s only a short term solution. It does work for me though. The lizards gave me a fright when I first saw them in the house but they don’t bother me now. Time I suppose. They seem harmless any. Not keen on the cock roaches. But as a friend pointed out I’m a… Read more »
We had a big problem with ants in the kitchen, they just seemed to pour out of every crack and crevice. Tried various poisons but the only one they actually fell for was ARS, it comes with a sachet of poison and and refillable plastic holder, they happily marched back to their nest with it, and that was that.
That’s awesome! Thanks for sharing!
I’ve lived in Thailand (Bangkok, Srisaket and Mahasarakham) and O’ahu Hawai’i – definitely more roaches in Hawai’i!!! I’ve also had a bigger problem with rats when I lived in more rural areas of O’ahu. But Bangkok is a real mosquito heaven! That’s one of the reasons I like the Northeast, even though it is hotter than blazes. There are definitely more reptiles and amphibians in Thailand though. Watch out if there is a tokkay territorial war going on at your house – you won’t get a good night’s sleep until it is settled. I speak from experience. As for ants…the… Read more »
We’ve never heard the lizards fighting at night, but we can imagine that it sounds like something out of a horror story. We hear enough cat fights at night where we live, it would just add to the chaos. You had us laughing out loud about the “the bet revenge is to eat their babies”. :) You know, we’ve seen them sell the eggs at our market, but we’re not quite sure out to prepare them and we’ve never been offered them by Thai friends or locals. But w hear they are pretty decent and wouldn’t mind giving them a… Read more »
There is nothing I hate more than rats. Fire ants bite really hurts. What kind of ants are there in Thailand? I have read about these insects, bugs, and rats in Thailand but I never realized this bad. It makes me to think twice about visiting Thailand. Do you think that living in a highrise condo will help?
These weren’t fire ants that bit me, but something really tiny. Typically we see big black ants, small red ants, and medium brown ants. To be fair, we sometimes had ants back in the US, too. Our current house is sealed well so we have very little problems with the larger critters. If you live in a highrise we wouldn’t expect you to have rats. They typically hang around the dumpsters or roadside trash.
Have either of you gotten malaria or dengue fever? How realistic is it to wear long sleeves/pants/shoes in such hot/humid weather?
We haven’t gotten malaria or dengue fever, but we know of three people who’ve contracted dengue fever and no one with malaria. They’ve had fevers, skin rashes, and pain in their eyes, palms, and soles of their feet. It lasted about a week. It’s unrealistic to think that people living in Chiang Mai wear tank tops and shorts year round. Ok, maybe some people do, but it does gets cool here, especially if you’ve acclimated to the blazing daytime heat. Evenings and mornings are generally cool enough to wear long sleeves and pants for maybe five or six months of… Read more »
No and I am so glad u wrote this…I was planning on going but now I know…nope!
Well, at least you can say you were well informed!
Chris and Angela, this post is right up my alley because heck!…..after spending over 20 months in Thailand I’ve seen quite a bit of bug guys. Kelli is less scared of roaches these days but before the trip she was terrified! We’ve seen: 3 inch cockroaches in the wilds of Koh Lanta, 6 inch long elephant scorpions in Koh Lanta, small geckos, tokays, dead centipedes (thank God lol), all types of small ants, tinier ants, biting ants, army ants, fire ants, big red ants, a 10 foot python swimming in a stream on Chiang Mai Lamphun Road (right by the… Read more »
There are too many kinds of ants! We’ve had three different kinds in our kitchen at the same time before. Luckily we’ve never dealt with a live scorpion, but thinking back to it we’ve seen a kimono dragon (dinosaur lizard thing) in Bangkok while we were touring the Chao Prao Ra River. You’re right about the roach dancing on you in the middle of the night… that’s the worst. We hope you haven’t anything like that since!
Great tips! Thankfully I’ve not encountered any huge spiders…yet. Did have a Whip Scorpion once though! They’re creepy but harmless like the spideys. To help keeps ants away, I’ve found regular old baby powder helps. If they’re on a table, or have come in a window, I sprinkle the powder at the window entrance or around table legs etc.. Enough to block their path. It has worked like a charm so far! :) If you keep a glass of water next to your bed at night, keep a lid/book/cover on it, or you’ll get a mouthful of ants. Husband learned… Read more »
We’ve already drank ants :/ They do like water glasses! The grey pod things have worms inside, and we assume they turn into some kind of moth (the little black heart shaped ones, perhaps?) We picked them off the walls as much as possible at our old place, but our new place doesn’t have them. We suppose they don’t do any real harm, they are just an eyesore. Good to know about the baby powder!