Fennel seeds, the Chinese medicine cumin, has the effect of dispersing cold and relieving pain (relieving pain by removing cold from the body), regulating qi and harmonizing the stomach, and has the effect of treating cold hernia and abdominal pain (acute abdominal pain caused by internal cold and external wind-cold), testicular deviation, dysmenorrhea, cold pain in the abdomen, distension of the epigastrium (abdomen), and vomiting and diarrhea with low food intake. Fennel is the dried mature fruits of fennel of the umbelliferae plant, pungent flavor, warm nature, belonging to the liver, kidneys, spleen, stomach meridian, has the effect of dispersing the cold pain, qi and stomach, is mainly used to treat cold hernia and abdominal pain, testicular deviation fall, dysmenorrhea, cold pain in the abdomen, epigastric distension and pain, eating less vomiting and diarrhea and other diseases. It should be noted that fennel has a strong warming effect, and should be used with caution in cases of yin deficiency (deficiency of yin essence in the body and hyperactive fire). Chinese medicines or proprietary Chinese medicines need to be used under the guidance of a Chinese doctor to identify the evidence, individuals should not use blindly, so as not to cause adverse consequences.