Iliotibial Band Syndrome
Iliotibial (IT) band syndrome is a common overuse injury that causes pain on the outer side of the knee or, less often, the hip. It occurs when the IT band - a thick band of tissue running from the hip to the shin - becomes irritated from repeated friction, often during activities like running, cycling, or hiking. Symptoms usually build gradually and can worsen with continued activity. With rest, targeted strengthening, and activity modification, most people recover well.
Overview | Symptoms & Causes | Diagnosis | Treatment Options
The Iliotibial (IT) Band
The iliotibial band (ITB) is a thick band of connective tissue that runs down the outside of your thigh. It starts at the hip (attaching to muscles like the tensor fasciae latae and parts of the gluteal muscles) and travels down to the outside of the knee, where it connects to the shinbone. Its main job is to help stabilise the leg during movement, especially walking, running, and going up or down stairs.
Iliotibial Band Syndrome (ITBS) occurs when the ITB becomes irritated as it repeatedly rubs or tightens over the outer side of the knee or, less commonly, the hip. This friction leads to inflammation and pain, particularly during activities that involve bending and straightening the knee. ITBS is one of the most common causes of outer knee pain in runners, cyclists, and people who do repetitive lower-limb activity, but it can affect anyone.
Understanding IT Band Syndrome
ITBS typically causes pain on the outer side of the knee, but symptoms can vary depending on how irritated the band has become. Common features include:
- Sharp or burning pain on the outside of the knee, often worsening with activity.
- Pain that starts after a certain amount of running or walking, then gradually appears earlier in activity if not treated.
- Tenderness when pressing on the outside of the knee, especially over a small bony area called the lateral femoral epicondyle.
- A feeling of tightness running down the outside of the thigh.
- Pain when going downhill or downstairs, as these movements increase tension through the ITB.
- Discomfort when bending and straightening the knee repeatedly, such as during cycling or long periods of walking.
Less common symptoms include:
- Pain higher up the thigh or at the outer hip, if the ITB is tight along its entire length.
- A snapping or clicking sensation at the outer knee due to friction between the ITB and underlying structures.
- Mild swelling on the outer side of the knee in more irritated cases.
Causes and Risk Factors
ITBS occurs when the iliotibial band becomes irritated as it moves repeatedly over the outer part of the knee. This is usually the result of overuse, biomechanical factors, or training errors that increase strain on the band.
| Repetitive activity | Frequent knee bending from running, cycling, hiking, rowing, or other endurance activities. |
| Muscle tightness | Tight IT band, glutes, hip flexors, or quadriceps increasing tension on the outer knee. |
| Weak hip muscles | Reduced gluteal strength leading to poor hip stability and increased strain on the IT band. |
| Training errors | Sudden increases in distance or intensity, downhill running, or running on slanted surfaces. |
| Footwear issues | Improper or worn-out shoes affecting leg alignment and loading. |
| Biomechanics | Flat feet, high arches, leg length differences, or knee valgus (“knock-knees”). |
| Individual factors | High training volume, previous hip/knee problems, or inadequate warm-up and conditioning. |
Diagnosing IT Band Syndrome
ITBS is usually diagnosed through a combination of clinical assessment and, when needed, imaging to rule out other causes of outer knee pain. Most cases can be identified based on symptoms and movement patterns.
A clinician will start by asking about your symptoms, activity levels, training habits, and when the pain appears. They will examine the knee and hip for tenderness over the outer knee where the IT band runs, assess leg alignment, IT band tightness, and the strength of the hip and gluteal muscles. Specific movement tests, such as the Ober or Noble test, may also be used to help confirm irritation of the IT band.
| Ultrasound | Can show inflammation around the IT band, detect thickening, and rule out other causes of lateral knee pain (such as bursitis or tendon problems). It’s dynamic, meaning the clinician can watch the tissues move in real time. |
| MRI | Used less frequently, but helpful if symptoms are not improving or if another knee condition is suspected. MRI can show subtle inflammation or other structures contributing to pain. |
Treatment Options
Most cases of iliotibial band syndrome improve with conservative, non-surgical treatment. The goal is to reduce inflammation, manage pain, and address the underlying movement or strength issues contributing to IT band irritation.
Conservative Treatments
| Activity modification | Reducing or temporarily stopping activities that worsen pain, such as running or cycling, allows inflammation to settle. Switching to lower-impact exercise (like swimming or using an elliptical trainer) can help maintain fitness during recovery. |
| Pain relief | Ice, rest, and anti-inflammatory medication (if suitable for you) can help reduce discomfort during flare-ups. |
| Physiotherapy | A physiotherapist can provide manual therapy, tailored exercise programmes, gait retraining, and advice on biomechanics or footwear. This is often key to long-term improvement. |
Procedural Options
| Steroid Injection | In cases of persistent pain that does not settle with rehabilitation, an ultrasound-guided steroid injection around the inflamed area may be used to reduce inflammation and allow physiotherapy to progress. |
| Surgery | Surgery is rarely needed and reserved for severe, persistent cases that do not respond to extensive conservative treatment. |
How can Lanthorn help?
Ultrasound Knee - £300
A detailed musculoskeletal ultrasound can assess the outer knee where the IT band passes, checking for inflammation, thickening, or associated bursitis. It can also help rule out other causes of lateral knee pain, such as tendon problems, and some joint issues.
MRI Scan - From £350
If symptoms are persistent or the diagnosis is unclear, an MRI can provide a comprehensive view of the knee and surrounding structures. This helps confirm IT band involvement and exclude other conditions such as meniscal tears or stress injuries.
Ultrasound-guided Steroid Injection - £450
For cases that don’t respond to rest and physiotherapy, we can provide targeted steroid injections under ultrasound guidance. This ensures precise placement around the inflamed tissue, helping reduce pain and allowing rehabilitation to continue more effectively.
