Gardenia is a common skin disease in midsummer. Traditional Chinese medicine believes that gardenia is caused by the heat and dampness of the summer heat, condensing the skin, and causing the hair and hair to be cold. The first step in preventing and treating gardenia is to eliminate the poison of summer heat. As the saying goes, often drink Sandou Tang to relieve heat and protect health. Three types of beans: green beans, red beans, and black beans. They are boiled into soup, which is called Sandou Soup by Chinese medicine. The mung bean in the recipe is cold and sweet, and has the effects of clearing heat and detoxifying, and diminishing heat and diuresis. It is an ideal food for the prevention and treatment of heat stroke, heat rash and sores in the summer. Ulcers, swellings and swells have a better resolution effect; black soybeans and flat flavors (raw and flat, fried and hot, and boiled and cold) have the effects of nourishing the spleen and kidney, removing dampness and wate r, and promoting blood circulation. Combined with three beans, it has the functions of clearing away heat and detoxifying, strengthening the spleen, and dampening dampness. Therefore, it is effective to relieve heat and dispelling heat. Specific method: 10 grams each of mung bean, red bean, and black bean, add 600 ml of water, boil to low heat to 300 ml, and drink with beans and soup.