A sprained knee occurs when a patient suffers a direct or indirect external force to the knee joint. If the patient wants to recover as soon as possible after the injury, he or she needs to be seen by a doctor who can provide different treatments depending on the condition, most of which are conservative. The patient needs to rest in bed, and the knee joint can be fixed with a brace or plaster brace, and a golden ointment can be applied externally to invigorate blood stasis, reduce swelling and pain, or an ointment can be applied externally with futalin agent, or an orthopedic wash in Chinese medicine, and herbal fumigation of the knee joint can be performed. It can also be combined with acupuncture and moxibustion, which can accelerate local blood circulation and promote muscle metabolism, so that the damaged tendons and bones can be recovered as soon as possible. Patients should not dispose of this condition by themselves or blindly massage it to avoid aggravating the condition.