There is no subcutaneous fat in navel, blood vessels are very rich, drugs are easy to penetrate and absorb, and drugs are not damaged by the interference of gastric enzymes, so the dosage is small and the effect is quick. Navel, as a unique route of administration for human body, has the functions of restoring yang, inducing resuscitation and consolidating qi through dressing or hot ironing. It is especially suitable for patients with gastrointestinal and liver diseases. Because umbilical application of traditional Chinese medicine does not undergo liver metabolism and can reduce side effects, it is an ideal route of administration.