From the common cold to the more serious ailments, regular steam sessions are proven to strengthen your immune system to help fight against illness and bugs. The humid environment increases core temperature and 'tricks' the body into believing it has the flu. Your body's natural reaction is to go into defense mode and create white blood cells and to practice 'natural self-healing'.
Think of it as training your body. When a real illness comes around, such as a cold, a steam shower will help open up your airways and loosen any mucus