What to know about IT band syndrome in runners

The iliotibial band is a strong strip of tissue running along the outer thigh from the hip toward the shin. Repeated knee bending during running can irritate the tissues around its lower end. Pain may feel sharp or burning, often appearing after a predictable distance or during downhill running. The outer knee may be tender, while swelling is often limited. Hip muscle weakness, a sudden increase in training, hills, speed work, or worn equipment can add strain, but the cause is not always one single factor.

Pause the run or movement that reliably brings on pain, then keep comfortable low-impact activity if it does not worsen symptoms. Use a gradual return rather than testing the knee repeatedly. A physiotherapist can assess hip strength, running mechanics, flexibility, and training load, then prescribe exercises such as controlled hip abductor and glute strengthening. Gentle mobility may help comfort, but forcing a painful stretch can irritate the area. Check footwear and training surfaces, and increase distance or intensity only when everyday movement and easy exercise are comfortable.

Arrange an assessment if pain keeps returning, changes your stride, limits stairs, or does not settle after reducing the provoking activity. Seek prompt medical care after a significant injury, inability to bear weight, marked swelling, a locked knee, fever, redness, or severe pain at rest. Outer-knee pain can also come from other problems, so an examination matters when symptoms do not follow the usual activity pattern.

Ask: Which movements are irritating my knee? What training can I continue safely? Which hip and leg exercises fit my current strength? How should I judge readiness to run, and what should I do if pain returns?