Zheng Gu Shui External Analgesic Lotion
This analgesic, or pain reliever, is used to soothe aches. It was historically used to treat broken bones and other injuries suffered in combat. Hence its name zheng gu shui, which translates from Mandarin Chinese as "bone setting solution."
Now it's used to treat backache, arthritis, bruises, and sprains, and is known to be ineffective for healing serious injuries such as bone fractures.