Tyres need to be inflated once a week. When you add petrol (gasoline) to the bike, you should inflate the tyres to 32PSI as well.
However, if you have punctured the inner tube of the tyre, it’s usually because you have inadvertently ridden over something sharp, or possibly hit a pothole. In this case, you should contact a local tyre repairer. There are tyre repair/changing shops throughout the city. You can ask around, especially at Petrol (Gasoline) Stations or 7/11s.
Also, there are mobile tyre repair businesses which you can contact (or ask someone to contact). Outside businesses like 7/11s on power poles you will often find notices like this – you can either call/LINE the number yourself, or ask a Thai person to do it.
If you can’t find anyone to call a tyre repairer, you can contact this number on LINE – send a photo of your bike, and then a pin with your current location.