Knee pain requires the application of sprays for the cause. Such as trauma can be sprayed Yunnan Baiyao aerosol, synovitis can be sprayed safflower oil, soft tissue injuries can be sprayed tincture of antipyretic and analgesic, fracture can be sprayed with orthopedic water, and so on. 1. Trauma: If the knee trauma caused by joint pain, joint swelling, spray Yunnan Baiyao aerosol, blood circulation and dissipate blood stasis, swelling and pain. For more serious trauma can be sprayed first insurance fluid and then spray aerosol. If the local allergy after the use of drugs can not be used. 2. synovitis: for synovitis caused by joint pain, joint swelling, spray safflower oil is more effective, can activate blood and reduce swelling. 3. Soft tissue injuries: for pain caused by soft tissue injuries, you can spray tincture of antipyretic analgesic. 4. Fracture: For knee pain caused by fracture, the application of orthopedic water has a good effect. There are tendon relief, swelling and pain effects. Knee pain to clarify the cause of the disease, the application of different efficacy of the spray, menstruation or pregnancy can not be used. It should be reminded that the spray is only an auxiliary treatment, but also need to be based on the cause of the cause of treatment, can not rely on the spray treatment.