The words zheng gu shui mean “bone setting solution” in English. In my experience it’s simply the best solution for bruises, sprains and pain to the extremities with no bleeding. And Zheng Gu Shui relieves pain in the bones and joints as well. Yet another example of Traditional Chinese Medicine (TCM) that works. I have used this many times on my self and friends with astonishing results almost every time!
The only caveat: do not use in connection with infection or open wounds.

Reference: Zheng Gu Shui wikipedia.org