Fennel is a medicine and food, and is prohibited for people with yin deficiency and fire (deficiency of yin and essence in the body, resulting in hyperactive fire). Fennel is a drug and a food. From the perspective of Chinese medicine, it is important to note that it is prohibited for people with yin deficiency and fire exuberance. Excessive Yin deficiency and fire is commonly caused by overwork, old age and chronic illness, and excessive sexual intercourse, and is usually manifested as dizziness, tinnitus, five heart-heat (self-consciousness of heat in the hands, feet and heart, heart and chest), hot flashes (self-consciousness of heat spreading to the whole body at a specific time of the day, from the face or chest), night sweats, etc. Fennel has the ability to warm the kidneys and liver, as well as to warm the kidney and liver. Fennel has the effects of warming the kidneys and the liver, moving qi and relieving pain (relieving pain by regulating the body’s qi), and harmonizing the stomach. It is pungent in flavor, warm in nature and fragrant in aroma, which can warm the kidneys to dispel cold, regulate qi and dredge the liver, and disperse the cold in the lower Jiao to relieve pain, and it is a commonly used medicine for treating cold hernia. Fennel is aromatic, has the ability to warm the middle and disperse cold (to warm the spleen and stomach medicine to dispel cold), regulate qi and stomach, appetizing and eating, but also warm the kidneys to warm the waist. It is recommended that patients with physical discomfort, can go to a formal Chinese medicine hospital for diagnosis, and then under the guidance of the doctor reasonable, standardized medication, do not take blindly.