The lower back can refer pain to the knee, as can the hip joint.
Bearing this in mind, the knee is a complex joint, and many conditions can affect it.
Frequently knee pain is related to poor biomechanics in the foot.
If the foot is "flat" the inside of the knee becomes stretched and the outside of the knee compressed. The kneecap will track wrongly causing inflammation and pain to be felt at the front and sides of the knee. This can be start of osteoarthritic changes. This condition will be greatly helped with Orthotics, which are specially shaped insoles for shoes.
The knee joint is prone to injury.
The ligaments and meniscus are frequently affected. When the internal parts of the knee are suspect, it is wise to have an MRI Scan, and a definite diagnosis can be then be made. As it is difficult to manually diagnose an internal injury to the knee joint.
Knee Trigger Points
When Trigger Points are present the thigh muscles, pain can be experienced in Knee.
Trigger Point Therapy or massage may help with this type of condition.
Trigger Points behind the knee, in the Popliteus muscle, can also cause knee pain and stiffness.
Chondromalacia Patella is a condition where the cartilage behind the knee cap is worn, this causes pain behind the knee cap. This condition often responds well to treatment with Acupuncture, or if the patient is hypermobile, orthotics will help stop excessive knee extension.
When Osteoarthritis effects the knee Acupuncture can often help.