How common is knee locking in osteochondritis dissecans?

Osteochondritis dissecans affects a small area of bone and its covering cartilage, often near a weight-bearing part of the knee. Symptoms can include activity-related pain, swelling, catching, or a knee that cannot move through its usual range. If the affected area becomes unstable, a fragment can interfere with smooth motion and produce locking.

The symptom is a common presentation of this condition, but knee locking has other causes too. Assessment considers age, activity, pain location, swelling, and whether the joint catches or stays blocked. Imaging may help show the involved area and whether it appears stable.

Pause running, jumping, and other activities that bring on pain or catching. Do not force the knee through a block. Keep movements gentle and comfortable, and use support when walking if instability makes you unsafe. Arrange an orthopaedic assessment, particularly when symptoms persist or the knee repeatedly catches.

Care is tailored to the stability of the affected area, symptoms, and skeletal maturity. It may include reducing load, supervised rehabilitation, and follow-up imaging. A clinician can set safe limits for weight-bearing and explain when activity can be increased.

Seek prompt medical care if the knee is fixed in one position, you cannot bear weight, or swelling and pain become severe. Urgent evaluation is also needed after a significant injury or if the foot becomes numb, cold, pale, or weak. Avoid trying to free a locked knee by force.

Ask whether the affected area appears stable, whether imaging is required, what weight-bearing is safe, and how often follow-up is needed. Ask which symptoms could indicate that a fragment has become loose.