Knee synovitis can be used externally diclofenac diethylamide latex, ketoprofen gel and other anti-inflammatory swelling, need to follow the doctor’s instructions for medication. 1. Diclofenac diethylamine emulsion: anti-inflammatory, analgesic effect, can reduce inflammatory swelling, relieve pain. Used to relieve mild to moderate pain in soft tissues, muscles and joints. Adverse effects of this product include dermatitis such as skin redness, itching, papules, edema, tingling, small blisters, large blisters, scaling. Allergic to the product, women in pregnancy is prohibited. 2. Ketoprofen gel: has a significant anti-inflammatory, analgesic effect, can quickly transdermal, localized for the treatment of rheumatism, trauma caused by joints, tendons, ligaments, muscle pain. Adverse reactions are skin allergic reactions such as eczema, dermatitis, urticaria, solar dermatitis. It is contraindicated for those who are allergic to the product. Synovitis of the knee requires resting the affected joints, avoiding weight-bearing and strenuous exercise, and should be regulated under the guidance of a doctor.