In some of the ancient cultures of Asia, the process of steaming of herbs with medicinal properties existed long before Christ. The countries that led the world in discovering the medicinal benefits of breathing in such herbs include India, Japan, China, and Taiwan. Plants such as wild Chamomile, Laurel, and Passion flower along various tea plants were chosen by the scientists from Europe to study the benefits that they produced when heated. As the benefits of these vapours are now known, most of the people consider using these and these do not need an extra effort.
The pioneer country that is believed to have discovered the medicinal properties of the medicinal herbs is China. The first product among these shrubs was tea, the leaves of which were steamed or baked to get the essence and aroma and to ensure that the leaves do not get spoiled in the course of its transportation. The most important reason was to avoid fungus spores in this highly valued plant. Although apparently people might not be able to understand the relation between steaming tea and vaporizers, the process of steaming of the tea leaves eventually resulted in the process of herbal cure.