My Knee Hurts on the Outside When Running
Outer knee pain while running is most often iliotibial band syndrome (IT band syndrome). It is a common overuse injury among people who run a lot.
What Is the IT Band?
The IT band (iliotibial band) is a long fibrous band that starts at the side of the pelvis, runs along the outer thigh, and extends to the outer knee.
Function
Stabilizes the knee and pelvis when you run or walk.
How the Problem Develops
Repetitive knee bending causes the IT band to rub against the outer knee bone (lateral femoral condyle), leading to inflammation.
Do You Have These Symptoms?
Outer Knee Pain
The pain is especially bad when the knee is bent about 30 degrees. It hurts when your foot strikes the ground while running.
Starts After a Certain Distance
You feel fine at first, but the pain begins after running a certain distance. It eases when you rest and returns when you run again.
Going Down Stairs
The pain gets worse when going down stairs or descending a slope.
Tender to the Touch
There is tenderness when you press the bony prominence on the outer knee.
What Causes It?
Overuse + Muscle Imbalance
Suddenly increasing your running distance or speed, or having weak hip muscles (glutes), puts excessive load on the IT band.
Sudden Spike in Training
When you suddenly increase your running distance or frequency
Weak Glutes
When weak hip muscles let the pelvis wobble, the IT band becomes overly tight
Bow Legs or Knock Knees
Leg alignment problems increase friction on the IT band
Shoes and Surface
Worn-out running shoes, or repeated running on sloped roads
How Is It Treated?
IT band syndrome tends to come back if you simply rest. You also have to address the root causes: muscle imbalance and tension.
Key point: the hip (pelvic) muscles must be treated as well
The IT band starts at the pelvis. Treating the knee alone leads to recurrence. Because weak glutes (hip muscles) and pelvic instability are the underlying cause, treating the knee and pelvis together is the effective approach.
Treatment Goals
1. Release tension in the IT band and surrounding muscles
2. Strengthen the weakened glutes (hip muscles) ← the key
3. Restore pelvic stability
4. Correct running form and adjust training volume
Resolving IT Band Syndrome with Circulation Treatment
We treat the knee and the pelvis (hip) together
- Circulation HD: Releases adhesions in the IT band, glutes, and pelvic fascia, and calms the inflammation
- Circulation PT: Strengthens the glutes (gluteus medius and maximus), restores pelvic stability, and corrects running form
Self-Care Tips
Foam Roller Stretching
Gently work the outer thigh with a foam roller. Pressing too hard can actually make things worse.
Glute Strengthening
Strengthen the side hip muscles with exercises like clamshells and side leg raises.
Adjust Your Training Volume
When it hurts, rest from running or cut your distance. Don’t increase your weekly volume by more than 10%.
When Should You See a Doctor?
• When the pain lasts more than 2 weeks
• When it hurts even just to walk
• When the pain doesn’t ease with rest
Related Questions
Frequently Asked Questions
Does stretching the IT band (iliotibial band) actually help?
The IT band itself is fascial tissue, so it does not lengthen with ordinary stretching. Strengthening the gluteus maximus and gluteus medius and improving hip mobility is more effective. Rolling the outer thigh with a foam roller can help relieve tension temporarily.
Should I stop running if I have outer knee pain?
If the pain gets worse during running, we recommend resting for 2 to 3 days. If you have no pain when walking, you can cut your distance by more than half and gradually resume. If it lasts more than 2 weeks or you feel pain even during normal walking, you need a proper examination.
Could outer knee pain be cartilage damage?
A lateral meniscus injury and IT band syndrome occur in similar locations but have different mechanisms. IT band syndrome usually worsens with repetitive running motion, while a lateral meniscus injury tends to worsen with twisting motions or impact. A physical examination is needed to accurately distinguish between the two.
How often should I replace my running shoes?
We generally recommend replacing them every 500 to 800 km. If the outsole wear pattern is asymmetric or the cushioning has noticeably worn down, consider replacing them sooner. Choosing running shoes suited to your gait pattern (such as whether you overpronate) also helps prevent IT band syndrome.
Do You Have Knee Pain While Running?
We’ll find the exact cause and help you get back to running.
Book OnlineReferences
- Louw M, Deary C. The biomechanical variables involved in the aetiology of iliotibial band syndrome in distance runners. Phys Ther Sport. 2014;15(1):64-75.
- Falvey EC et al. Iliotibial band syndrome: an examination of the evidence behind a number of treatment options. Scand J Med Sci Sports. 2010;20(4):580-587.
- Noehren B et al. ASB clinical biomechanics award winner 2006: prospective study of the biomechanical factors associated with iliotibial band syndrome. Clin Biomech. 2007;22(9):951-956.
- van der Worp MP et al. Iliotibial band syndrome in runners: a systematic review. Sports Med. 2012;42(11):969-992.