Blood-remaining charcoal is usually taken by decoction with water. It enters the liver meridian and stomach meridian, with bitter taste and flat nature, and has the effect of stopping bleeding and removing blood stasis, and is often used in the treatment of hemorrhagic bleeding, vomiting blood, urinating blood, epistaxis, and bleeding from traumatic injury, etc. It belongs to the group of hemostatic drugs that can remove blood stasis. Blood-remaining charcoal belongs to the group of hemostatic drugs that can be used both internally and externally to remove blood stasis and stop bleeding. It can be used both internally and externally. With the effects of stopping bleeding and removing blood stasis, Haematoxylin can be used in the treatment of various kinds of hemorrhagic disorders. The adverse effects of this drug are not clear, but pregnant women should be cautious of using Blood Yu Charcoal, and those who have a history of allergy to Blood Yu Charcoal are forbidden to use it. Blood Yu Charcoal is a kind of traditional Chinese medicine and should not be used blindly on its own. If you have bleeding, you should consult a doctor in time, and use Blood Yu Charcoal under the guidance of a professional Chinese medicine practitioner.