Ginger soup for cold and flu can be taken by decocting water. Ginger is the fresh rhizome, which is pungent in flavor and slightly warm in nature. It belongs to the foot-yangming stomach meridian, foot-taiyin spleen meridian and hand-taiyin lung meridian. It can stop vomiting, warm the middle, relieve cough and phlegm, detoxify fish and crabs, and disperse cold to relieve symptoms. Ginger has the effect of dispersing cold and relieving symptoms of cold, and can be used to treat mild cases of wind-cold flu, but its effect is relatively weak. It can be used in combination with Qiang Wu and Gui Zhi to enhance the effect of dispersing cold from the surface of the body. Ginger has the effect of resolving phlegm and relieving cough, and can be used for cold-phlegm cough, which is caused by external wind-cold. It can be used in combination with almonds and ephedra. Ginger is not suitable for people with internal heat and heat deficiency. It is recommended to take under the guidance of a physician to avoid self-medication.