Fennel and gunpowder ginger applied to the navel have the effect of warming the middle and tonifying the kidneys, promoting qi circulation and relieving pain (relieving pain by regulating the body’s qi). Fennel is warm in nature and has the effect of warming the kidney and liver, promoting qi circulation and relieving pain; Cannonball Ginger is warm in nature and has the effect of warming menstruation and stopping bleeding, warming the middle and relieving pain (relieving pain by warming the spleen and stomach). The adverse reactions or contraindications of the above drugs are not clear. Fennel and gunpowder ginger can be applied to the navel to warm the middle and tonify the kidney, move Qi and relieve pain. It is suitable for vomiting caused by cold and dampness, Qi stagnation, stomach pain, cold pain in the lower back, dysmenorrhea, loose stools (thin and unformed feces), hernia, and impotence, premature ejaculation, and so on. It should be noted that this method cannot be used if there are sores or ulcers around the navel, as well as those with allergies. If the patient has uncomfortable symptoms, should go to the hospital in time, under the guidance of the doctor for formal treatment, not self-treatment, in order to avoid adverse consequences.