The length of time you should stay in a sauna will vary from person to person. Factors that will influence the duration of your sauna sessions are whether you are heat adapted, personal heat tolerance, and health conditions. You should start with shorter sessions and gradually increase as you become more heat-adapted. It's important to pay attention to your body's signals. Be sure to stay hydrated by drinking water before and after your sauna session. If you have any health concerns or medical conditions, talk to a healthcare professional before using the sauna.