A nice warm shower or bath about an hour or two before bed will help your body temperature regulate to the ideal range for sleep, according to Dr. Rich Friedenheim, the medical director of the Sleep Disorders Center at Abington Hospital-Jefferson Health.
"When you leave your shower or bath, you actually have evaporation. Your hands, the soles of your body and that evaporation process actually results in you body cooling off, so your body is getting a head start in cooling off and that cooling off can signal melatonin which also promotes sleep," Friedenheim said.
He says the warm shower can also help you fall asleep an average of nine minutes faster.
But don't think that taking a cool or cold shower would be better for the cooling off process as that will actually make your body warmer and make sleep more difficult.