At least you know you are on vacation in the tropics. The spicy food makes me brake out in a sweat too. To compensate for the fluid loss I drank lots of water and sweet milk shakes. It was funny, in some grocery stores a bottle of water costs nearly as much as the place for the night. The nights are like in the movies set in Alabama.
Most people sleep in their underwear on top of the sheet under the fan.
The city is busy throughout the day. The parks remain favorite hangouts for locals. Some just take naps at the benches, others jog around the Sanam Luang park in downtown. I didn't have to jog to transpire. I used the time to stroll around the markets.