When in use, powder is first poured, pressed along the bottle wall, and leveled with the bottle mouth with a flat spoon of about 0.25g g. Yunnan Baiyao has the effects of promoting blood circulation and relieving pain, detoxicating and detumescence, and is often used to treat traumatic injury, blood stasis and swelling, hemoptysis and hematochezia, and skin infection. The correct method for external use of Yunnan Baiyao should be applied before redness, swelling, sores and toxic pus are broken, and once it is broken, it should not be used externally.