Things You Should Never Do in Thailand (Unless You Want Bad Luck!) — A Foreigner's Survival Guide to Thai Superstitions

Growing up in Thailand, I never really questioned the strange little things my family did. We never whistled at night. We never cut our nails after sunset. And if we accidentally dropped a coin, we'd pick it up carefully — never stepping on it, not just because of respect for the King's image, but because it was considered bad luck.

It wasn't until I started hanging out with foreign friends that I realized how bizarre (and sometimes hilarious) these customs might seem to outsiders. One of my American friends once asked me, "Why do Thais avoid haircuts on Wednesdays?" I just shrugged and said, "Because it's bad luck." When he asked me why, I had no idea.

The truth is, Thailand is a country where the unseen world and everyday life blend seamlessly. Superstitions aren't just old folk tales; they influence how people behave, make decisions, and even run businesses. So if you're planning to visit Thailand (or just want to avoid pissing off the local spirits), here are a few things you definitely shouldn't do.

🚫 1. Don't Whistle at Night

If you've ever walked through Bangkok's night markets and felt like whistling a tune, resist the urge. Thai people believe that whistling at night invites ghosts into your home. And trust me, you don't want an unexpected visitor.

Even if you don't believe in ghosts, you might notice that many Thais hesitate before whistling after dark. My mom used to tell me, "If you hear someone whistling outside at night, don't look out the window — it might not be a person." That was enough to keep me quiet.

✂️ 2. Never Cut Your Nails or Hair After Sunset

According to Thai superstition, cutting your nails or hair at night shortens your lifespan. It's a belief that goes way back, rooted in old traditions when people didn't have electricity. In those days, cutting yourself with a sharp blade in dim candlelight could be dangerous.

Even today, many older Thais still avoid it, just in case. My grandmother once scolded me for trimming my nails after dinner, saying, "Do you want to invite bad luck?" Did I stop? Of course. I wasn't about to risk it.

🏚️ 3. Don't Call Someone's Name in the Dark

Imagine this: You're walking home at night, and you hear someone call your name from behind you. What do you do?

If you're in Thailand, the correct response is not to turn around immediately. Instead, you should ask, "Who is it?" before acknowledging them. The belief is that ghosts can trick you by calling your name, and if you answer too quickly, they might just take that as an invitation.

A foreign friend of mine had a spooky experience with this. He swore he heard his Thai roommate call his name when he was coming home late one night. But when he got back to their apartment, his roommate was fast asleep. Needless to say, he started following this rule very carefully after that.

🍚 4. Never Tap or Knock on a Bowl Before Eating

This one surprises a lot of foreigners. In Thailand, tapping your spoon against a bowl before eating is believed to summon hungry ghosts (Phi Pret). These are restless spirits with giant mouths and tiny throats, cursed to wander, unable to satisfy their hunger.

It's kind of like saying, "Hey ghosts, come share my food." Not exactly the dinner guests you want.

🚪 5. Always Knock Before Entering a Hotel Room

This is something every Thai person does automatically. When checking into a hotel (especially in older buildings or rural areas), you should always knock on the door before stepping inside — even if the room is clearly empty.

Why? Because spirits might be using the room. Knocking is a way of politely letting them know you're coming in, so they can leave. Some people even say "Excuse me" (Kor thod na krub/ka), just to be extra safe.

A friend of mine once skipped this step while staying in an old hotel in Chiang Mai. That night, she swore she heard someone whispering in her room, even though she was alone. The next time she checked into a hotel, she made sure to knock first.

🎰 6. Avoid Unlucky Numbers (Especially 13 and 6)

Thais are very particular about numbers. The number 9 (gao) is considered extremely lucky because it sounds like the Thai word for "progress." That's why many people try to get phone numbers or license plates with lots of nines.

On the other hand, 6 (hok) sounds like "fall" or "failure," so it's considered unlucky. And 13 is avoided just like in Western culture. Many buildings in Thailand don't have a 13th floor. Instead, they skip straight to 14 — because why take the risk?

I once met a Thai business owner who spent a fortune changing his phone number because a fortune teller told him it had too many 6s. The week after he changed it, he landed a huge contract. Coincidence? Maybe. But Thais don't mess around with luck.

🔥 Final Thoughts: Welcome to the Unseen Thailand

Thailand is a land of beautiful beaches, incredible food, and warm smiles — but it's also a place where superstitions shape everyday life. Whether you believe in ghosts or not, following these little customs will earn you respect from locals (and keep you from accidentally offending any unseen spirits).

So next time you visit Thailand, don't whistle at night. Don't tap your bowl. And for the love of all things holy, knock before entering your hotel room. You never know who — or what — might already be inside.

What Do You Think?

Have you ever experienced any spooky or superstitious moments in Thailand? Let me know in the comments!