Yunnan Baiyao aerosol can treat some of the causes of knee pain such as collision, but for such as knee osteoarthritis and knee joint infection or gouty arthritis caused by knee pain is generally less effective. Yunnan Baiyao aerosol has the effect of activating blood circulation and removing blood stasis, stopping bleeding, reducing swelling and relieving pain, clinically it is mainly used for pain and discomfort caused by bruises and other injuries, and its general effect is good, and clinically it is more commonly used. However, due to its unique pharmacological properties are not suitable for all causes of knee pain, for some infections, gouty arthritis, articular cartilage degeneration caused by knee pain, need to take other methods of treatment. Yunnan Baiyao aerosol in the application of the treatment of knee pain generally need to clarify the cause of the disease, the need to go to the hospital in a timely manner, by the specialist physician to make reasonable arrangements for the use of medication, but also pay attention to the drug allergy or skin damage do not use.