External Damp (Huo Xiang Zheng Qi Shui) was released from the Song Dynasty “Tai Ping Formulas of welfare dispensary”, which has a history of more than 1,000 years. It has the effect of expelling exterior Damp, regulating Qi and harmonizing the Stomach. External Cold leads to Damp, which disturbs Stomach and Intestine. It manifests as acute abdominal pain, nausea and vomiting, bowel diarrhoea, fever and chills, headache, chest fullness, greasy tongue coating, which is now called acute gastroenteritis or a gastrointestinal type cold or flu and can also be used for food poisoning, travelers’ diarrhoea. Chinese medicine believes that the new coronavirus pneumonia outbreak in the world in 2020 is caused by a Cold and Damp epidemic. The External Damp disperses Cold and Damp, regulates the gastrointestinal Qi, avoids the turbidity. Therefore, it is widely used in the early prevention and treatment of coronavirus.

In southern China, the mountains are steep, the rain is heavy, the weather is hot, and the humidity is strong. According to a legend, more than 1,000 years ago, the southern tribes rebelled, and the court sent troops to hunt them down. Due to the long journey, most of the soldiers felt too cold and wet, they were unaccustomed with the hot humidity hot and 100,000 troops were dying. The general of the soldiers was so anxious that he had to seek medical advice. The local people then suggested to the generals the recipe of External Damp. Amazingly, after the soldiers drank the potion, the symptoms quickly disappeared, their physical strength recovered, and they then defeated the rebels. Because Huoxiang was used as the king herb in this prescription and the morale of the armed forces was greatly boosted, the Chinese named it Huo Xiang Zheng Qi Shui.