The efficacy of blood residue charcoal lies in astringency, stopping bleeding, resolving blood stasis, and also has diuretic effect, which is often used in clinic to treat bleeding caused by various reasons, and also to change the symptoms of dysuria (unsmooth urination). Blood-remaining charcoal is a kind of Chinese herbal medicine with astringent and hemostatic effects, and also has the characteristic of stopping bleeding without leaving stasis, which can be used in clinics to treat hemoptysis, vomiting of blood, epistaxis (nosebleed), hematuria, blood in stool, and women’s metrorrhagia (excessive menstrual flow or dribbling), etc. It is often used in combination with ice tablets to treat bleeding caused by various reasons, and can also change the symptoms of dysuria (unruly urine). The drug is often used in combination with ice tablet for the treatment of ulceration of wounds that have not healed for a long time. Blood Yu Charcoal has diuretic properties and can treat dysuria, and is often used in combination with talcum powder to treat dysuria caused by summer heat. Since traditional Chinese medicine requires evidence-based treatment under the guidance of a traditional Chinese medicine practitioner, the specific medication must be strictly in accordance with the doctor’s instructions.