Fennel fruit is used to warm up the stomach when it is cold, causing abdominal pain, indigestion, decreased appetite or vomiting. It is also used to warm up the scrotum area and is used to treat hernias associated with cold blockage of the Liver Meridian. It is very effective for contracted scrotum due to cold (either external or internal cause) and "cold" hernia. Fennel fruit is useful for any kind of lower abdominal pain due to cold. Fennel fruit is also used in sexual tonics in combination with Yang Jing herbs since it has a warming effect and has local blood invigorating and nerve stimulating effects in the lower abdomen and genital area when combined with Yang Jing tonics. Fennel seed significantly increases the production and flow of mother's milk during lactation. It has been used for this purpose since ancient times.