Osteochondritis Dissecans: Symptoms, Causes, and Treatment — A Guide for Parents and Athletes
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: September 2026
Osteochondritis dissecans (OCD) is a joint condition in which a piece of bone — plus the cartilage covering it — begins to break loose due to lack of blood flow. It happens most often in children and teens aged 10–20 who play sports, most often affecting the knee (also elbows and ankles, usually one joint). Symptoms include activity-triggered pain, swelling, joint popping or locking, giving way, and reduced range of motion. In children whose bones are still growing, the bone may heal with rest, crutches, or bracing plus physical therapy; surgery is considered when a piece is loose or after 4–6 months without relief, and is often needed for adults and those who have stopped growing.
TL;DR
Osteochondritis dissecans (OCD) is a condition in which a part of the bone of a joint begins to break loose due to lack of blood flow. The slippery tissue called cartilage that covers the joint also begins to break loose. The condition may cause pain that gets worse over time and a feeling of the joint's motion being blocked.
Two facts shape what parents and athletes should know. First, it happens most often in school-age children and teens — mainly between ages 10 and 20 who are active in sports — and most often affects the knees, then elbows and ankles, usually in just one joint. Second, in children whose bones are still growing, the bone may heal with rest — no one treatment works for everyone.
The one rule for parents: ongoing joint pain, swelling, or an inability to move a joint through its full range of motion warrants an appointment with a healthcare professional rather than waiting it out.
Quick Answer: What You Need to Know About Osteochondritis Dissecans
OCD is a joint condition where a piece of bone — plus its covering cartilage — breaks loose due to lack of blood flow, causing pain that worsens over time and a sense of the joint's motion being blocked.
Most common in children and teens aged 10–20 who are active in sports; most often the knee, then elbows and ankles; usually just one joint.
Main symptoms: pain triggered by activity (stairs, hills, running, sports), swelling and tenderness, joint popping or locking, the joint "giving way," and reduced range of motion.
Exact cause is unknown — repeated small injuries may lower blood flow to the bone's end, and certain genes may raise the likelihood.
Diagnosis involves a physical exam (pressing the joint, feeling for a loose piece, checking motion) plus imaging: X-ray, MRI, and sometimes CT scan.
Treatment depends on growth status: growing children may heal with rest, crutches, bracing, and physical therapy; surgery is suggested for loose pieces, lack of relief after 4–6 months, or in adults and those who have stopped growing.
Untreated OCD raises the risk of early osteoarthritis in the affected joint.
What Is Osteochondritis Dissecans?
Osteochondritis dissecans (pronounced os-tee-o-kon-DRY-tis DIS-uh-kanz) is a condition in which a part of the bone of a joint begins to break loose due to lack of blood flow. A slippery tissue called cartilage — the smooth covering of the joint — also begins to break loose.
The condition may cause pain that gets worse over time and a feeling of the joint's motion being blocked. It happens most often in school-age children and teens.
Fact | What It Means |
What it is | A piece of bone plus its covering cartilage begins to break loose due to lack of blood flow |
Who it affects | Most often school-age children and teens aged 10–20, active in sports |
Which joints | Most often the knees; also elbows, ankles, and other joints — usually just one joint |
Most common symptom | Pain brought on by physical activity |
Why it matters | Untreated, it can raise early osteoarthritis risk in the affected joint |
Growing-bone advantage | In children whose bones are still growing, the bone may heal with rest |
What Are the Symptoms?
Symptoms depend on which joint is affected and how far along the condition is. The five main symptoms are listed below.
Symptom | How It Shows Up |
Pain | The most common symptom; physical activity brings it on — walking up stairs, climbing a hill, running, or playing sports |
Swelling and tenderness | The skin around the joint might be swollen and tender |
Joint popping or locking | The joint might pop or stick in one place if a loose piece gets caught between bones during movement |
Joint weakness | The joint might feel weak or like it's "giving way" |
Less range of motion | The affected arm or leg may not straighten all the way |
When Should You Seek Care?
Two clear situations call for an appointment. If you or your child has ongoing pain or soreness in the knee, elbow, or another joint, see a healthcare professional. Also make an appointment if there is joint swelling or if you or your child can't move a joint through its full range of motion.
For a young athlete, persistent joint pain is never something to simply push through — early evaluation is what protects the joint's long-term health.
What Causes Osteochondritis Dissecans?
Experts don't know the exact cause of osteochondritis dissecans. What is known comes down to two possibilities, and neither is settled science.
Repeated small injuries over time might lower blood flow to the end of the affected bone. And people with certain genes may be more likely to get the condition.
Symptoms may appear after a single injury to a joint — or after doing an activity that greatly loads the joint for several months. This pattern is mainly true for high-impact sports and those that involve cutting and pivoting, such as soccer and basketball.
What Are the Risk Factors?
Risk Factor | How It Raises Risk |
Age and activity | Happens mainly in children and teens between ages 10 and 20 who are active in sports |
Sport type | High-impact sports, and sports involving cutting and pivoting — such as soccer and basketball |
Obesity | May raise the risk |
Genetics | People with certain genes may be more likely to develop the condition |
The condition most often affects just one joint, and most often the knees. Elbows, ankles, and other joints can also be affected.
What Are the Possible Complications?
Two complications are worth understanding. Over time, osteochondritis dissecans can raise the risk of getting osteoarthritis at an early age in the affected joint. And if the condition is not healed all the way, it can cause ongoing pain and trouble using the joint.
This is why evaluation and follow-through on treatment matter more than for an ordinary sports strain.
Can Osteochondritis Dissecans Be Prevented?
Prevention focuses on how young athletes train. Learning about the risks to the joints linked with overuse can help teens who play sports. Learning how to move properly in their sports can help lower the chance of injury — and so can training for the sports they play, strength training, and exercises that improve body control and balance.
How Is Osteochondritis Dissecans Diagnosed?
Diagnosis combines a careful physical exam with imaging that shows both bone and cartilage.
Physical Exam and Staging
During a physical exam, a healthcare professional presses on the affected joint, checking for swelling or tenderness. Sometimes it's possible to feel a loose piece of bone and cartilage inside the joint. Your healthcare professional also has you or your child move the joint to check its range of motion.
Healthcare professionals stage osteochondritis dissecans by three characteristics: the size of the injury, whether the piece of bone and cartilage is partly or totally loose, and whether the piece stays in place.
Imaging Tests
Imaging Test | What It Shows |
X-ray | Shows the structure of the bone and anything unusual in the joint or bone |
MRI (magnetic resonance imaging) | Uses radio waves and a strong magnetic field to make detailed images of both hard and soft tissues — bone and cartilage; may be done if X-rays appear OK but symptoms persist |
CT scan | Joins X-ray images taken from different angles; may help show where the loose fragments are within the joint |
How Is Osteochondritis Dissecans Treated?
The goal of treatment is to help the affected joint work well, relieve pain, and lower the risk of osteoarthritis. One important caveat up front: no one treatment works for everyone.
The most encouraging fact: in children whose bones are still growing, the bone may heal with rest.
Medications
Nonsteroidal anti-inflammatory medicines available without a prescription can provide short-term pain relief, including ibuprofen (Advil, Motrin IB) and naproxen sodium (Aleve).
Rest and Physical Therapy
At first, a healthcare professional may suggest a combination of rest measures and therapy.
Approach | Details |
Resting the joint | Keep the child from activities that stress the joint, such as jumping and running with an affected knee |
Crutches | May be needed for a time, mainly if pain causes limping |
Splint, cast, or brace | Keeps the joint still for a few weeks |
Physical therapy | Includes stretching, range-of-motion exercises, and strengthening exercises for the muscles that support the affected joint; often suggested after surgery as well |
Surgery
Surgery might be suggested in these situations.
Scenario | Why Surgery Is Considered |
A loose piece of bone and cartilage is in the joint | The loose piece can catch and damage the joint during movement |
No relief from rest and physical therapy after 4 to 6 months | Conservative treatment has been given a fair trial without success |
Growth has stopped, or the patient is an adult | Once bones stop growing, the natural healing advantage is lost — children who have stopped growing and adults with OCD also often need surgery |
The type of surgery depends on the size and stage of the injury.
Preparing for Your Appointment
You might first talk with your main healthcare professional, who might send you to a doctor who specializes in sports medicine or orthopedic surgery.
Before you go, make a list of your or your child's symptoms and when they began, key medical information including other conditions, all medicines, vitamins and supplements including dosages, any recent accidents or injuries that might have harmed the joints, and questions to ask.
Questions worth asking: What's the most likely cause of this joint pain? Are there other possible causes? What tests can help with diagnosis? What treatment do you suggest? What can I do to keep symptoms from coming back?
Questions the doctor may ask: Is the joint swollen? Does it lock or give out? Does anything make the symptoms better or worse? How bad is the pain? Has the joint been injured, and if so, when? Which sports does your child play?
Key Takeaways
Osteochondritis dissecans is a joint condition in which a piece of bone and its covering cartilage begin to break loose due to lack of blood flow. It is primarily a condition of young athletes — most often affecting the knee in children and teens aged 10–20 — and usually involves just one joint.
The encouraging news: in children whose bones are still growing, the bone may heal with rest, supported by crutches, bracing, and physical therapy when needed. No single treatment works for everyone, so treatment is individualized.
Surgery becomes the right path when a piece is loose, when rest and therapy fail after 4 to 6 months, or once growth has finished. Left untreated, the condition can raise the risk of early osteoarthritis in the affected joint.
The message for parents of young athletes: ongoing joint pain, swelling, or lost range of motion deserves a professional evaluation — early attention protects the joint's long-term function.
Talk to a healthcare professional about any persistent joint pain in a child or teen — a proper evaluation determines whether rest is enough or whether imaging and a treatment plan are needed.
Frequently Asked Questions
What is osteochondritis dissecans?
Osteochondritis dissecans (OCD) is a condition in which a part of the bone of a joint begins to break loose due to lack of blood flow. The cartilage covering the joint also begins to break loose. It may cause pain that worsens over time and a feeling of the joint's motion being blocked.
Who gets osteochondritis dissecans?
It happens most often in school-age children and teens — mainly between ages 10 and 20 — who are active in sports. It most often affects the knees, but can also affect elbows, ankles, and other joints, and usually involves just one joint.
What are the symptoms?
The most common symptom is pain brought on by physical activity, such as walking up stairs, climbing a hill, running, or playing sports. Other symptoms include swelling and tenderness around the joint, joint popping or locking, the joint feeling weak or "giving way," and reduced range of motion — the affected arm or leg may not straighten all the way.
When should I take my child to a doctor?
See a healthcare professional if your child has ongoing pain or soreness in the knee, elbow, or another joint. Also make an appointment if there is joint swelling or if your child can't move a joint through its full range of motion.
What causes osteochondritis dissecans?
Experts don't know the exact cause. A small injury repeated over time might lower blood flow to the end of the affected bone, and people with certain genes may be more likely to get the condition. Symptoms can appear after a single joint injury or after months of an activity that heavily loads the joint.
Can osteochondritis dissecans heal without surgery?
In children whose bones are still growing, the bone may heal with rest. Initial treatment typically includes resting the joint, crutches if pain causes limping, a splint, cast, or brace, and physical therapy. No one treatment works for everyone.
When is surgery needed?
Surgery might be suggested if a child has a loose piece of bone and cartilage in the joint, or doesn't get relief from rest and physical therapy after 4 to 6 months. Children who have stopped growing and adults with OCD also often need surgery. The type depends on the size and stage of the injury.
Does osteochondritis dissecans cause long-term problems?
Over time, it can raise the risk of osteoarthritis at an early age in the affected joint. If not healed all the way, it can cause ongoing pain and trouble using the joint — which is why follow-through on treatment matters.
Can osteochondritis dissecans be prevented?
There is no guaranteed prevention, but young athletes can lower their risk by learning about joint overuse risks, learning to move properly in their sports, training for their specific sports, doing strength training, and practicing exercises that improve body control and balance.
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Health information, not medical advice. This article is for general education and is not a substitute for professional diagnosis or treatment. Always consult a qualified healthcare provider about your own health, and seek emergency care for urgent symptoms.
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