Water lilies generally have the functions of clearing away heat, relieving summer heat, resisting bacteria and diminishing inflammation. Water lilies are generally large and grow in water, with short roots, oval leaves and rectangular petals. Water lilies kept in the bedroom can play a role in refreshing the air. Clinically, it is mainly used to treat summer-dampness cold caused by pathogenic heat, wind-heat cold and summer-heat disorder. Water lilies have the effects of clearing away heat, relieving summer heat, relieving hangover and relieving convulsion. Water lilies can effectively produce oxygen, resist pollution, purify the air and adjust the humidity in the air.