I need a massage, and that's very easy in Thailand, every beach, every street, practically has a massage place.
Tourists think all massage places are really brothels, but that's nonsense. As a general rule, if the front is shut off and pink neon signs announce its a massage place, then you can get a massage there but it won't be a very good massage!
I choose the large white massage place, next to Udom Suk BTS station. It has clear pricing, offers Jasmine rice scrubs and aromatherapy, as well as the more traditional Thai massages. But really you can find plenty of these places everywhere. Just avoid the pink neon close-front ones!
300 baht for one hour at low times, 400 at peak, that's a good price.