ITB friction syndrome, also known as iliotibial band syndrome (ITBS), is a frequent knee injury characterized by pain or tenderness on the outer side of the knee, just above the joint line and below the lateral femoral epicondyle. It is classified as a non-traumatic overuse injury and is normally associated with weak hip abductor muscles. Repetitive movements can lead to increased friction between the iliotibial tract and the lateral femoral epicondyle; and this contributes to irritation and discomfort.
Symptoms
Common symptoms of ITB friction syndrome include:
Hip pain: Inflammation and discomfort may result from the iliotibial band rubbing on the greater trochanter, where the femur expands close to the hip. There’s also a possible snapping sound.
Clicking sensations: A popping, snapping, or clicking feeling may be felt on the outer side of the knee.
Knee pain: Friction between the iliotibial band and the lateral epicondyle of the femur can result in pain and inflammation near the knee.
Warmth and redness: The external knee area may feel warm when touched and appear red or discolored.
Causes
ITB friction syndrome develops when the iliotibial band becomes excessively tight and repeatedly rubs against the bone, causing irritation and inflammation. Some of the factors that can lead to this tightness include:
Too much foot flexion: Outward foot rotation stretches the iliotibial band and brings it near the bones.
Hip abductor weakness: Limited ability to rotate the hip outward can increase pressure in the iliotibial band.
Internal tibial torsion: Twisting the shinbone inwards can draw the iliotibial band nearer to the bones, increasing friction.
Medial compartment arthritis causing genu varum: This disorder, where the knees spread apart whenever the ankles touch, can cause tightness in the iliotibial band.
Pre-existing tightness: Some people naturally have a tighter iliotibial band, making them more prone.
Diagnosis
Our clinicians at The Joint Pain Clinic diagnose ITB friction syndrome by conducting a comprehensive physical exam to evaluate the iliotibial band (ITB) and detect painful or inflamed areas. An ultrasound scan further enhances this assessment, which offers a detailed view of the ITB and nearby structures.
Management and Treatment
Our ITB friction syndrome treatment ranges from self-care strategies to specialized medical interventions, depending on the severity of symptoms. These options include:
Rest: Limiting activity until the discomfort resolves is usually advisable. Your clinician can guide you on balancing rest and daily activities appropriately.
Physical therapy: Your physiotherapist can recommend strengthening exercises, stretching, and other therapies to ease hip and knee pain. Appropriate warm-up and cool-down practice may also be advised.
Posture training: Maintaining the right posture during daily activities and sports can help lessen tension in the iliotibial band.
Steroid injections: These injections provide targeted relief by minimizing inflammation and easing pain at its source.
Hyaluronic acid injections: These help enhance lubrication and minimize inflammation along the iliotibial band to improve mobility and comfort.
Prevention
While preventing ITB friction syndrome can be difficult, particularly for athletes such as cyclists, skiers, or long-distance runners, implementing these strategies can minimize the risk:
Not running on uneven or sloped surfaces.
Focusing on proper technique during all physical activities.
Steadily increasing training intensity instead of making abrupt changes in haste or resistance.