Iliotibial Band Syndrome

Written By: Chloe Wilson, BSc(Hons) Physiotherapy
Reviewed by: KPE Medical Review Board

Iliotibial Band Syndrome is a common causes of lateral knee pain, especially with runners.

Iliotibial Band Syndrome (ITBS) is one of the most common injuries seen in runners. It causes lateral knee pain on the outer side of the knee, which can radiate up the thigh. 

Iliotibial Band syndrome is a common cause of running knee pain, frequently affecting long distance runners and can be notoriously difficult to treat.

This condition is also known as Iliotibial Friction Syndrome, ITB syndrome or ITBS and is often misdiagnosed as Runners Knee. 

The Iliotibial Band (ITB) is often mistaken for a muscle but it is actually a thick band of fibrous tissue that runs down the outside of your leg from your pelvis to your knee. It has a different structure to muscles, making it less mobile and harder to stretch.

Some of the buttock and hip muscles attach to it, and the ITB co-ordinates how these muscles work as well as stabilising the knee and leg.

Here we will look at the typical causes and symptoms of ITBS, the best treatment options, and and how to reduce the chances of developing ITBS.

What Is Iliotibial Band Syndrome?

So what is Iliotibial band syndrome? Iliotibial Band Syndrome develops when the ITB gets irritated and inflamed due to friction. 

Iliotibial band syndrome (ITBS) is a common cause of lateral knee pain

This most commonly occurs at the bottom of the band where it inserts on the outer side of the knee.

As the leg bends and straightens, the ITB glides over a bony lump on the side of the knee that sticks out slightly, called the lateral epicondyle. 

A bursa (small fluid filled sac) sits between the ITB and the bone to allow smooth, gliding movements, but if there is too much friction, the Iliotibial Band gets irritated. When it is irritated, friction from walking and running can cause inflammation and pain to develop.

Inflammation of the ITB usually occurs from overuse and is most commonly seen in runners, especially those who do long distance running.

What Causes ITB Syndrome?

Certain factors can make you more prone to developing Iliotibial Band Friction Syndrome:

1) Muscle Problems

Tightness in the leg muscles and the Iliotibial Band itself increases the friction on the ITB. Weakness in the buttock muscles (glutes) puts more strain on the Iliotibial Band, increasing your chances of developing Iliotibial Band Syndrome

2) Running

Excessive running is a common cause of Iliotibial Band Syndrome

Long distance running can also lead to Iliotibial band syndrome due to repetitive friction. Lots of running surfaces e.g. roads and running tracks are slightly banked. The foot position on the lower leg causes the Iliotibial band to be stretched making it more prone to damage. Running up and down hills also puts even more tension through the ITB 

3) Sudden Increase in Activity

Someone who rapidly increases their training is at risk of developing Iliotibial Band Syndrome due to the sudden increase in friction at the knee

4) Biomechanics

Anything which changes the normal position of the leg can place more strain through the ITB. If you have flat feet (dropped foot arches), a leg length discrepancy (one leg longer than the other) or bowed legs (increased curvature of the legs) you are more prone to developing ITB syndrome

Symptoms of ITBS

The main symptoms of Iliotibial Band Syndrome are:

1) Lateral Knee Pain: pain over the outer side of the knee, especially when the heel strikes the floor. The pain is worse with running and stairs, especially when going down. It may also hurt to bend and straighten the knee.

2) Swelling: on the outer knee due to inflammation or thickening of the Iliotibial band

3) Popping/Snapping Sensation: this can occur when you bend the knee as the ITB flicks over the lateral epicondyle

ITB Syndrome Treatment

As with any overuse injury, it is really important to work out what caused the Iliotibial band to become inflamed in the first place. A physical therapist/sports injury specialist should be able to assess this for you. It can take several weeks/months to recover fully from Iliotibial Band Syndrome.

Short Term Treatment

The initial aim of iliotibial band syndrome treatment is to reduce the inflammation which will in turn also reduce the pain. This is most effectively done using:

1) Relative Rest

It is important to give the ITB time to heal so aggravating activities should be avoided. It’s not that you would cause major damage if you kept training, but you will significantly slow down your recovery.

This is one of those times when the mantra “No pain, no gain” does NOT apply! Visit the Rest it Right section for guidance on the how to rest, but remember in this case, if an activity hurts, stop doing it!

2) Regular Ice

Ice can help reduce the inflammation associated with ITBS

Ice therapy can be used to help reduce inflammation, but only when used correctly. Visit the Ice Treatment section to find out how to get the maximum benefit from using ice and the ice wrap section for the best ways to apply ice

3) Take Anti-inflammatories

Medications such as ibuprofen can be helpful in reducing pain and inflammation with ITB syndrome

4) Change Your Sport

If your symptoms are aggravated by running, you might find that switching to activities like swimming or cycling allow you to keep exercising without aggravating the Iliotibial Band.

Longer Term Treatment

Long term treatment aims to address the cause of the Iliotibial Band Syndrome and may include:

1) Do Strengthening Exercises

Strengthening exercises are a vital part of iliotibial band syndrome treatment. Strengthening the glutes, quads and hamstrings improves how the hip and knee function which reduces the friction on the Iliotibial Band. Visit the knee strengthening section for exercises that will help

2) Start Stretching Exercises

The best place to start is with ITB stretches, but should not be done in isolation. Stretching the quads, hamstrings and calf muscles also helps reduce the friction at the knee.

Visit the stretches section for simple tests to see if tight muscles is likely contributing to your ITB Syndrome and loads of great ways to stretch each of the muscles

3) Wear A Knee Strap

Knee straps help take the tension and friction off the Iliotibial Ban

Wearing a brace that straps around the top of the knee directs forces away from the Iliotibial band so can be very helpful to reduce irritation when running. Visit the knee strap section to find out which ones work best

4) Try Taping

Taping can also be used to reduce the forces going through the ITB – see you physical therapist/ sports injury specialist for more information

5) Have a Sports Massage

Deep tissue massage to the Iliotibial Band can reduce tightness, but it can be quite painful. It should be carried out by a trained sports therapist or physical therapist and should be followed up with an exercise programme

6) Try Orthotics In Your Shoes

Special insoles can be worn in your shoes to correct poor foot positions such as flat feet and thus take the tension of the ITB. See an orthotist for a full assessment and advice

7) Steroid Injections

Steroid injections can help to reduce the pain and inflammation associated with iliotibial band syndrome

If other treatments have failed, a cortisone injection can be given to help reduce pain and inflammation. However it should always be accompanied by strengthening and stretching exercises to ensure the problem doesn’t return

8) If All Else Fails, Then Surgery

Surgery for ITBS is extremely rare and is only considered if all other treatments have failed. It is done arthroscopically (keyhole surgery) and aims to break down any scarring in the tissues and if necessary lengthen the Iliotibial band to reduce the friction at the knee.

How To Prevent Iliotibial Band Syndrome

The most common cause of Iliotibial Band Syndrome is running. In order to prevent ITB syndrome from developing or recurring runners should ensure they:

1) Warm up and cool down properly: including stretching. Visit the stretching section for guidance on how to stretch effectively: most people don’t stretch properly.

2) Wear good running shoes

3) Wear orthotics if required: to correct any abnormal foot positions or leg length discrepancies

4) Avoid training errors: such as avoiding running in the same direction on banked surfaces and slowly increasing distances.

There are a number of other causes of lateral knee pain as well as Iliotibial Band syndrome. If this doesn’t sound quite like your problem, visit the knee pain diagnosis section for help working out what is wrong with your leg.

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Page Last Updated: 17/03/19
Next Review Due: 17/03/21

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