How many border bounces can you do with a tourist visa in Thailand without being turned away?

I hope all works out for you. I plan to initially live in Thailand but may eventually move to Cambodia or another nearby nation. If so, I’ll need to go to Thailand monthly for medical treatment and will be in a similar boat.

I have been in Thailand since December. And I’m in a van right now coming back from my second and consecutive land border bounce. The officers in both Thailand and Malaysia were super nice at each window.

The other person who went with me had been in Thailand for 3 years and she has taken 1 month holiday in Malaysia, otherwise she said it’s been a same day exit/entry or just an overnight for a quick get away.

Even though whatever treatment cannot get medical visa. You can still get a letter from them that would help if you got stopped. (Anything to prove you are not working)

Officially you can do 2 land border crossings per calendar year (01 JAN - 31 DEC) and there is no official limit on Fly out/In border bounces, however you may run into an overzealous I/O that sees otherwise...you can also extend all Border Bounces at immigration for 1,900 THB for an additional 30 Days, until the I/O says you can't...you can buy a 60 Day SETV at any Thai embassy/consulate for 1,900 THB and you can extend that at immigration for an additional 30 days for 1,900 THB (90 Total Days in Thailand), you can get 2, 60 Day SETV's back to back but once again you may run into an overzealous I/O that says that says you can't when you arrive back to Thailand...Good Luck, the Royal Thai Embassy and the Royal Police don't communicate well together so the embassy will sell you visas and the I/O's will deny them...

Adding to what brandon said, it really depends on the person and your conditions. As long as you can prove that you're not working illegally in Thailand and have a legit reason to be here (medical treatment) you won't be turned away. Before covid I lived in Thailand about 3.5 years on tourist visas/exempt entries. Never had a problem.

You have some incorrect information here.

There is no limit to entries by air. There is no 6 entry limit. The only limit written into law is that you can do 2 land border entries with visa exempt per calendar year.

What matters much more than the number of air entries is how long you've been in Thailand. You'd likely have no problem at all coming in for 1 week every month for a year, because you're not spending that long in Thailand.

Where you run into problems is if you are entering, getting an extension, then leaving and re-entering immediately, and repeating this. Then you are clearly trying to live or stay in Thailand and are not a tourist, therefore you are not using the appropriate entry option. I would expect to be questioned on your 3rd entry, regardless of how you are entering. They will likely ask a lot of questions about why you are living in Thailand on an incorrect visa, an warn you that it's your last time.