The iliotibial bundle is a long flat muscle and tendon in the lateral thigh, starting at the hip and ending just below the lower joint on the outside. Iliotibial bundle friction syndrome, an inflammation of the iliotibial bundle caused by overuse of the knee joint, commonly known as runner’s knee, is a common cause of pain in the lateral knee joint. Long-distance running, long-term bicycling, limb deformities (unequal legs, screw-leggedness, abnormal pelvic tilt) are all high-risk factors for iliotibial bundle inflammation. In addition to rest, the use of anti-inflammatory and analgesic drugs, physical therapy, there are also the following stretching rehabilitation methods: 1, relaxation of the broad fascia tensor muscle (foam axis) side lying position, supported by the elbow joint, the upper leg around the front of the lower leg, and step on the ground, set the foam axis in the broad fascia tensor muscle back and forth rolling pressure rub, hold for 2 minutes, each time two groups, each group of two minutes. You can also use a golf ball in the same lateral position, placed at the broad fascia tensor, rolling back and forth, holding for 30 seconds (4-5 times each time). 2, relaxation of the iliotibial bundle (foam axis) side lying position, with the elbow joint for support, the upper leg around the front of the lower leg and step on the ground, foam axis placed on the outer thigh (iliotibial bundle) rolling back and forth to press and knead, hold for 2 minutes, each time two groups, each group of 2 minutes. 3, the stretching of the iliotibial bundle, the right hand on the wall, supported by the left leg, the right leg around the back as far as possible to put the ground, and then squat, feel the broad fascia tensor, the iliotibial bundle stretch tension (the outer thigh stretch tension, as well as calf, the whole jump leg outside can be stretched, need to stretch the left and right legs, adjust the position left and right by themselves). 4, strengthen the muscle strength of the thigh muscle group. 5, the outer thigh soft tissue self-massage. 6, stretching the gluteal muscles, with the broad fascia tensor stretch.