A little bit of red is bitter-cold and belongs to the heart and lung meridian, which has the effect of clearing heat and detoxifying, cooling the blood and diuretic. This product is effective when used alone, or in combination with Huang Lian. If internal fire toxicity causes mouth ulcers, Huang Lian Shang Qing Tablets can be given in a little red infusion. This product has the effect of clearing lung heat, treating lung-heat coughs and sore throats, and can be used in combination with Scutellaria baicalensis. A little bit of red has the function of clearing damp-heat, and is used to treat heart fire moving down to the small intestine, resulting in dripping and astringent pain in urine, with bamboo leaves, and painful urination and blood in urine with mucuna pruriens and slippery stone. It is also effective in cooling the Blood, treating coughing and urinating blood caused by heat entering the Blood and forcing the Blood to move freely. It should be noted that this product is cold in nature and injures the spleen and stomach, and should not be taken for a long time.