Ai Rong, mugwort is also known as wormwood. The leaves are gathered on a warm dry day in spring and summer when the plant is in flower and dried in the shade. In traditional Chinese medicine, they are considered to have bitter, pungent and warm properties and to be associated with the liver, spleen and kidney meridians. The herb is considered to increase the blood supply to the pelvic region and stimulate menstruation, help treat infertility, dysmenorrhea, asthma and coughs. A well-known use of mugwort is in moxibustion.