The instructions for use of Yinhu Cold and Flu San did not specify the time of application of this product, so how long it takes to tear off the sticker is not a mandatory requirement, the general symptoms can be torn off after relief. Yinhu Cold and Flu San contains Chinese medicinal ingredients such as Ginkgo biloba, Chaihu, forsythia, Artemisia annua, Thorax, Mentha piperita, Patchouli and other Chinese medicinal ingredients, which have the effect of dispersing the wind and relieving the epidermis, clearing away heat and detoxifying the toxin (removing heat and toxicity in the body), and can be used for the treatment of wind-heat flu due to the chills (coldness), fever, headache, sneezing and nasal congestion, coughing, and general malaise. This product is for external use, internal use is strictly prohibited, and do not touch the eyes, mouth and other mucous membranes, pregnant women should also be prohibited, and the skin should be avoided in broken places. Its adverse reactions are not clear, but if the site of the drug if obvious burning sensation or itching, redness and swelling, should stop using the drug, and wash the drug, if necessary, can consult a doctor, the specific use of please read the instructions for the use of drugs and consult a physician or pharmacist.