Lateral knee tendon pain, bending pain can be based on the cause of the application of non-steroidal painkillers, chondroprotectors, hormone drugs and nutritive nerve drugs, etc., may be associated with lateral collateral ligament injuries, osteoarthritis, tendonitis, lumbar disc herniation, etc., need to be the cause of the medication, follow the doctor’s instructions for the use of medication. 1. Lateral collateral ligament injury: Lateral collateral ligament injury can cause pain on the outside of the knee, which can be relieved by oral ibuprofen or topical diclofenac diethylamine latex and other non-steroidal pain relieving drugs. 2. Osteoarthritis: Osteoarthritis pain caused by degeneration of the knee joint can be treated with oral non-steroidal painkillers such as celecoxib and cartilage protectors such as glucosamine sulfate. 3. Tendonitis: for tendonitis caused by tendonitis, non-steroidal painkillers such as ibuprofen can be applied, or local injection of betamethasone and other hormonal drugs for closed treatment. 4. Lumbar disc herniation: Lumbar disc degeneration and herniation cause the nerve root of the lower limb to be compressed, and the lateral knee tendon pain occurs. Oral ibuprofen and other non-steroidal painkillers or methylcobalamin and other nutritive nerve drugs for treatment. There are other causes of lateral knee tendon pain, bending pain, such as excessive exercise, trauma, etc., if the persistence of non-relief, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, standardized treatment under the guidance of the doctor, medication is only a part of the treatment, can not be blindly self-medication, so as not to delay the condition.