Allium cepa has the efficacy of promoting Yang circulation and dispersing stagnation (warming Yang qi and dissipating stagnation), and promoting the flow of Qi and stagnation. Allium cepa is a traditional Chinese medicine, which is the dried bulb of Allium cepa, a plant of the genus Allium, family Liliaceae, with pungent and bitter flavor, warm nature, and has the efficacy of dispersing yang and dissipating stagnation and moving qi and directing stagnation. It is mainly used for treating chest paralysis (chest pain), heart pain, epigastric (abdominal) plumpness (stomach distension and discomfort), bloating and pain, diarrhea and dysentery (discomfort in the lower abdomen, wanting to defecate very much, and feeling of incomplete defecation after defecation) and other conditions. This product is used as decoction of soup for internal use, or into pills, powder, can also be eaten in porridge, but also can be used externally. The adverse reactions of this product are not clear. Note that this product is prohibited for those who are allergic to this product, allergic individuals should be cautious, those with Qi deficiency should be cautious, and those without stagnation should not use it. It is not suitable for those with weak stomach (no appetite, reduced food intake) and those who are intolerant to garlic flavor. This product is irritating to the gastric mucosa when taken for a long time, and is prone to yelping, so care should be taken when using it. If you need to use this product, you should be under the guidance of a physician, do not use the drug without authorization, so as not to cause adverse reactions.