The efficacy of external application of Qi Ci San is to dissolve blood stasis and eliminate swelling, relieve pain and stop bleeding, and can be used for bruises, blood stasis and pain, trauma and bleeding, etc. It should be used in accordance with the doctor’s prescription. Seven centigrade is composed of blood exhaust, frankincense, catechu, ice chips, myrrh, etc. It is used for the treatment of sprains and contusions caused by blood stasis and obstruction of collaterals, with symptoms such as pain in the affected area, fixation of the painful area, swelling, limitation of movement, subcutaneous bruising and stasis, purple and dark tongue, petechiae or ecchymosis, and varicose collaterals under the tongue, with white moss and astringent pulse, etc. The method of use is oral administration. Seven Cents San can be taken orally and applied externally to the affected area. Adverse effects are not clear, pregnant women are forbidden to use this drug. The existence of traumatic injuries using this drug should be under the guidance of a doctor reasonable use of medication. Large wounds, excessive bleeding should be promptly to the hospital for treatment, not blindly use their own medicine, so as to avoid excessive blood loss or secondary infection, aggravate the condition.