1, lumbar dorsal fascia too tight lumbar dorsal fascia tension is often common with the gluteus maximus tension in the functional line, the gluteus maximus and it together form a functional line, when the lumbar dorsal fascia is overly tight is equivalent to a tight shirt tucked into the trouser belt, squatting when the back of the shirt tension, can not squat completely, will compensate for the heel lift. 2, poor hip flexion When the gluteus maximus is tense, it will cause poor hip flexion, just as we wear a tight jeans shorts, can not squat completely. 3, poor knee flexion When the support band around the knee joint is tight or the quadriceps muscle is tight, it will cause the knee joint can not be fully flexed, unable to complete the squat. If the ankle joint is not sufficiently dorsiflexed, the patient will be forced to lift the heel when squatting, or be forced to squat in an outward position. A patient with knee pain may have one or more of the upper bundles that cause knee pain and limited squatting, which means that abnormal hip and ankle movement can cause knee pain as a manifestation. Therefore, it is important to pay attention to the above four factors in the treatment. How to identify the above four factors? Do single joint test separately 1. Visual examination of lumbar back When the patient bends forward, observe whether there is a flat waist and palpate whether there is tension and stiffness of the lumbar back fascia. Treatment should be done with 4 rows of silver needles on both sides of T9-S4 to relax the lumbodorsal fascia, or poke needles to relax the superficial lumbodorsal fascia. 2. Hip joint examination Gluteus maximus stretch test. The patient is in the supine position, and the plumb line of the knee joint falls on the lateral side of the opposite thigh, which is normal; or the pain of the gluteus maximus is induced when the gluteus maximus is stretched, which is positive. At this point, the starting and ending points of the gluteus maximus muscle due to treatment are equivalent to the double flying cloth needle method. 3.Knee joint examination The patient lies on his back, flexes the hip and knee, and tests the mobility of the knee joint, which is normal as the heel is one fist away from the hip. In case of tension, the fascial points of the quadriceps should be treated, as well as the medial and lateral collateral ligaments. 4. Ankle joint examination The supine extension and flexion of the knee with the foot dorsally extended and ankle mobility greater than 30° is normal. Check the outer and inner ankles for swelling or obvious pressure pain. If there are positive manifestations, the posterior calf fascia should be treated, needled and relaxed, mostly with fine silver needles. Intensive silver needle treatment of the inner and outer ankle is good for improving the mobility of the ankle joint. At the same time, it can improve the stability of proprioception on the whole ankle-knee-hip.