This is one of the pillars of "Die Da Medicine" (knocks and fall Medicine), a centuries old system of treatment that developed  around the practice of martial arts among monks and soldiers. Every injury type is classified according to several factors such as chronicity, level of swelling, pain, etc..and the appropriate association of herbs is applied to the area of injury. The variety and complexity of the herbal formulas used has no Western equivalent and, in my experience, its use is often critical in the treatment of severe injuries.