Saunas are generally without health risks, but people with high blood pressure, who are on medications or who have heart disease should consult a doctor before using saunas. Saunas are also not recommended for children or the elderly.
A 10- to 20-minute session is the right amount of time to spend in a sauna or steam room. In this period, a body can work up a good amount of sweat. Experienced sauna users can spend more time in a sauna, but beginners should not exceed the 10- to 20-minute range.
Any one who spends too much time in a sauna or steam room, runs the risk of becoming dehydrated or overheated and may faint after exiting the sauna. Individuals should drink plenty of water before, during and after using a sauna for this reason.