Long Xue Jie (龙血竭; Lóng Xuè Jié; Latin: Draconis Resina; English: dragon's blood resin) is the resin drawn from the trunk of the sword-leaf dragon tree, an evergreen tree of the agave family — the dark-red, glassy-shining resin kept in small jars in community pharmacy cabinets, often written in prescriptions for a bruised knee that will not settle. It is flat, sweet and salty, enters the Heart and Liver channels, and its core actions are to disperse stasis and ease pain, and to stop bleeding and promote tissue healing. It is the quiet repair herb for local bruises and broken skin. The usual internal amount is 1–2 g each time, 1–2 times a day, with a suitable amount for external use. No first, last, or wrapped step — take the fine powder directly with the strained decoction of the other herbs, or apply the powder to a wound. It is a medicinal piece, not a food.
It is not Mo Yao. Myrrh is flat, bitter, and acrid — its acrid scattering is stronger and it leans to moving qi and blood stasis; this dragon's blood resin is flat, sweet, and salty — it leans to dispersing local stasis, stopping bleeding, and promoting healing, more for a wound that bleeds or will not heal. It is not a catch-all stasis or pain resin; it acts within clear patterns. In pregnancy, or in deficiency-type pain without clear blood stasis, using it on your own is a poor match. Heavy bleeding, or a wound that will not heal, needs a clinic first. Do not take it yourself for a long time.
It is used most often for three patterns:
- Bruise and stasis pain — local purple swelling after a fall, fixed stabbing chest or flank pain from blood stasis
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Bleeding and broken tissue — bleeding from a wound that will not stop, a broken sore that will not heal, light digestive bleeding — seek care
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Pregnancy, deficiency-type pain without clear stasis, or bleeding without stasis — seek care / skip it
Flat, sweet, salty, and stasis-dispersing, it is not a daily "bruise resin" to keep increasing. Dispersing when there is no stasis, or in pregnancy, harms the body instead of helping.
When a fall or a blockage leaves blood stasis in a local spot — the place swells, hurts, turns purple, or a broken wound bleeds and will not close — the body needs a firm but precise disperse-and-heal rather than a strong purge. Long Xue Jie is flat, sweet, and salty. It disperses the stasis, eases the pain, stops the bleeding, and promotes healing, which is why it appears in Qi Li San (Seven-Li Powder)–type formulas. It heals more than it pushes. In pregnancy, or without stasis, more makes it worse.
Long Xue Jie is not a catch-all bruise or pain resin. In pregnancy, in deficiency-type pain without stasis, or in bleeding without stasis, using it alone is a poor match. Whether it belongs in a formula, and at what dose, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.