Iliotibial Band (IT Band) Syndrome
What Is Iliotibial Band (IT Band) Syndrome?
The iliotibial band (IT band) is a thick band of fascia (connective tissue) that begins at the hip, runs down the outer side of the thigh and attaches to the outer part of the knee. IT band syndrome is an overuse injury that arises from the repeated friction of this band over the bony prominence on the outer side of the knee, and it causes pain on the outer side of the knee.
It is most common in runners and cyclists and is linked to activities that require repeated bending and straightening of the knee. The large majority of cases do not require surgery and settle with rest, activity modification and physiotherapy. For other knee problems you can review the knee page.
What Causes It? Risk Factors
IT band syndrome results from a combination of training errors that increase the band's friction and structural factors specific to the individual. Knowing these factors makes treatment and prevention more effective.
- Training errors: a sudden increase in running volume or intensity, inadequate rest, running on cambered or uneven surfaces and worn-out shoes.
- Muscle imbalance: weakness of the hip abductor muscles in particular and poor trunk control.
- Structural factors: a difference in leg length, malalignment of the leg and differences in foot mechanics.
- Inadequate warm-up, lack of flexibility and not reviewing technique.
Symptoms
Symptoms typically begin during activity, often at a particular point in a run, and ease with rest. Over time the pain can be triggered earlier and more easily.
- Sharp or burning pain on the outer side of the knee; the pain often appears at a certain distance or time.
- Pain that becomes prominent when going down stairs and running downhill, with the knee slightly bent.
- Tenderness on the outer side of the knee and, at times, a rubbing or clicking sensation; in some patients it spreads to the outer side of the hip.
Conditions That Can Be Confused With It
There are other causes of pain on the outer side of the knee, and examination tells them apart. A lateral meniscus tear causes pain at the joint line and, at times, locking, whereas in IT band syndrome the pain is a little above the joint, at the level of the bony prominence, and mechanical locking is not expected.
Lateral ligament problems cause instability under sideways stress; patellofemoral (kneecap) pain, on the other hand, is felt more at the front of the knee. If there is pain on the outer side of the hip, bursitis and tendon problems around the greater trochanter are also considered in the differential.
Diagnosis: Examination and Imaging
The diagnosis is usually made from the history and physical examination. The location of the pain and which activity brings it on, and after how long, are asked about; tenderness is sought at the level of the bony prominence on the outer side of the knee.
On examination, hip muscle strength, leg alignment and running and walking mechanics are assessed. Imaging is not needed in every patient; MRI or ultrasound is requested when the diagnosis is uncertain, when another problem such as a meniscus or cartilage issue is suspected, or when the expected response to treatment does not occur.
Non-Surgical Treatment
The basis of treatment is to reduce the load that triggers the friction and to correct the underlying muscle imbalance. The aim is not just to quiet the pain temporarily but to prevent the problem from returning.
- Activity modification: temporarily reducing the running distance and gradient that provoke pain and switching to pain-free cross-training.
- Short-term cold application and anti-inflammatory medication under medical advice to manage pain and inflammation.
- Physiotherapy: strengthening the hip abductor muscles in particular, trunk control and, where needed, flexibility work.
- Reviewing running technique and equipment; replacing shoes on time and increasing distance gradually.
The most important step in rehabilitation is strengthening the muscles on the outer and back of the hip; when these are weak the knee drops inwards during running and the tension in the IT band increases. The programme usually progresses to gradual strengthening and movement control once pain has settled, and then to a return to running. A foam roller and stretching can provide relief but do not on their own resolve the underlying muscle imbalance.
Injections and Surgery
In selected, resistant cases a corticosteroid injection outside the joint may be considered to reduce pain and allow rehabilitation. An injection is not a treatment on its own; it is always planned alongside an exercise programme.
Surgery is very rarely considered, in patients whose symptoms persist despite prolonged, well-conducted non-surgical treatment. In that case procedures such as releasing the rubbing part of the IT band or debriding inflamed tissue may be chosen; the decision is made on an individual basis.
Recovery and Prevention
IT band syndrome usually has a good outcome when managed correctly; however, it tends to recur when load is increased too soon. Return to activity is planned gradually according to the resolution of pain and the recovery of muscle strength.
- Take a break from the activity that triggers the symptoms and then return to it gradually.
- Maintain a regular exercise programme that keeps the hip and trunk muscles strong.
- Do not skip your warm-up, increase distance and intensity step by step, and replace your shoes on time.
When Should You See a Doctor?
Having pain on the outer side of the knee assessed early allows the underlying muscle imbalance to be corrected and the loading that would make the condition chronic to be avoided.
- Pain on the outer side of the knee does not settle with rest or recurs quickly.
- The pain affects daily activities, going down stairs and walking.
- There is locking, marked swelling or a sense of giving way in the knee; these suggest a different problem.
For the assessment of knee and hip symptoms you can contact Assoc. Prof. Serkan Sürücü, and you can also review the other conditions covered within knee surgery.