Dragon's blood is a kind of resin Chinese medicine, which has the effects of removing blood stasis, relieving pain, stopping bleeding and promoting granulation. It is best to grind it into powder and take it with boiling water. In addition, the side effect of Sanguis Draxonis is easy to cause skin allergic reaction, so the daily dosage should be controlled between 0.3 and 0.9g. If there is allergic reaction, stop using this medicine immediately and treat it with antiallergic drugs.