There is a wider medical system known as Traditional Chinese Medicine, which includes Chinese herbal medicine as one of its treatment components. Herbs are given in order to restore energy balance to the opposing forces of energy, Yin and Yang, which are energetic energies that pass via channels in the body that are physically unseen.
Herbal medicine can be as simple as the rice we eat, or in the form of branches, leaves, flowers, seeds, minerals, shells, animals, etc. To keep in pace with the modern society, these herbs have processed into powder or tablet for ease of consumption.