Is okay to take a bath at night.

The blood flow bring the heat from the core to the surface and rejects the heat to the environment and causes a drop in body temperature. 

There for if you take a warm bath or shower at night biological time to 1 to 2 hours before bedtime, it will aid your natural circadian process and improve your sleep.The blood flow bring the heat from the core to the surface and rejects the heat to the environment and causes a drop in body temperature. There for if you take a warm bath or shower at night biological time to 1 to 2 hours before bedtime, it will aid your natural circadian process and improve your sleep.