Yinhu Cold & Flu San is a topical medicine, forbidden to be taken internally, and is applied to the umbilicus. Yinhu Cold & Flu Essence is made up of Gan Song, Yinhua, Chaihu, Platycodonopsis, Eucalyptus grandis, Mentha piperita, Artemisia annua, Forsythia, Thornybush, Ailanthus, Patchouli, Chenpi and other medicines, which have the efficacy of relieving wind, detoxifying and clearing away heat and fever, and can be used for wind-heat flu caused by malignant chills (coldness), coughing, sneezing and stuffiness of the nose, general malaise, and headache. Rub the umbilicus gently for about one minute before use, then pour the vial of medicated oil into the packet and apply it against the umbilicus. Apply one sticker daily, and add one sticker at the daxian point for severe cases. Adverse effects of this product have not been clarified, and it is prohibited for pregnant women. Do not touch the eyes, mouth and other mucous membranes when using this product, and do not use on broken skin. If there is obvious burning sensation or itching, localized redness and swelling at the site of application, the medicine should be stopped, washed, and if necessary, consult a physician. Children, the elderly and infirm should be used under the guidance of a physician. It is forbidden for those who are allergic to this product, and should be used with caution for those with allergies. Patients are advised to consult a doctor in time if they feel unwell.