Sounds like your masseuse was not well-trained. If the burn looks red, or looks like a circle-shaped sunburn, then that's a simple "1st degree" burn. Those burns will heal just like a sunburn all by themselves. First they will fade, then they will probably peel.
If you have any blisters on your skin under the burn mark, that's a "2nd degree" burn and will take longer to heal. If the burn is painful, you can take aspirin, Tylenol, or ibuprofen.
There are some things you should NOT do--
* Don't use ice. Ice is too cold for burned skin and can cause more damage.
* Don't use ointments. This could cause infection.
* Don't break blisters. Broken blisters can get infected. Leave the blisters alone!
How long your skin needs to heal will vary from person to person. It depends on how bad the burns are, and how quickly you usually heal. When I get a bad sunburn, I don't start to peel until a week later. When my wife burns, she starts to peel two days later. So who knows!