The purpose of a sauna is to provide wet or dry heat sessions that promote both relaxation and perspiration. This takes place in a small room where bathers remove their clothing and assume a comfortable position while the hot temperature (greater than 80 C) penetrates their pores. The opening of the pores and sweating make it possible for impurities to easily be removed from the body. The detoxification has not only physical benefits, such as an improved immune system, but also psychological benefits, including a reduction in stress.

Sauna is an ancient Finnish word that describes the traditional Finnish bath. The first known saunas were essentially the lowest points dug in a slope in the ground mainly used as dwellings during winters. At the time the sauna included a fireside where stones were heated to very high temperatures. Afterwards, water was thrown on to the hot stones thus producing steam and heat. The temperature would increase so dramatically that people removed their clothing.

As time passed, the sauna evolved and began to feature a metal woodstove along with a chimney. Steam vapor was also generated by spraying water onto the heated stones. Air temperature was typically set between 70 and 80 degrees Celsius but on occasion exceeded as much as 90 degrees Celsius.

Often the Finns would use a 'vihta', a bundle of birch branches with fresh leaves, to gently swat themselves and other bathers to improve the experience. This practice not only aids in blood circulation, but adds a pleasant birch scent to the sauna.

Saunas relieve stress in two ways. Not only do they help you relax from simply spending time relaxing within, but they also help your body relax physically. When the sauna heats your skin, it helps to detoxify your body by making it sweat out more harmful toxins than you would have without its aid. Removing these chemicals helps your body fight stress and feel healthier.

Since the sauna makes you sweat, and the sweat removes toxins, the overall experiences helps to detoxify your body by forcing toxins out through the skin.

Finns utilize saunas on a regular basis, and saunas are lauded throughout Finland as the best, most natural way to cleanse oneself both in body and mind. Then and now, the sauna remains a key component to healthy living in Finland. Families often bathed together in home saunas, and in the past Finnish women often gave birth in saunas.

When the Finns migrated to the different parts of the globe they shared their knowledge of sauna designs and customs. They taught other cultures about the sauna's health benefits which helped the sauna to evolve further. Eventually, this led to the development of electric sauna stoves and far infrared saunas which became quite popular. Since then various cultures around the world have been recognizing, adopting and improvising the sauna.