Knee Pain Isn't Just an "Older Person's" Problem

There's a misconception that knee pain is exclusively a problem for older people with osteoarthritis. In reality, knee pain is extremely common in young and active adults—athletes, runners, people who play recreational sports, or have physically demanding jobs.

The key difference: the causes are fundamentally different. In a 25-year-old patient, knee pain is not (usually) osteoarthritis. It's something that, when diagnosed correctly and treated promptly, can be resolved much more simply.

The Most Common Causes in Young People

Patellofemoral Pain Syndrome (Anterior Knee Pain)

The most common cause in young people. Pain at the front of the knee, around or behind the kneecap (patella), worsened by climbing/descending stairs, prolonged sitting with bent knees ("moviegoer's sign"), or squatting. The cause: a muscle imbalance that prevents the patella from tracking correctly in its femoral groove. Treatment: specific physical therapy—strengthening the quadriceps (especially the vastus medialis), stretching the iliotibial band and hamstrings. It responds excellently to conservative treatment.

Patellar Tendinopathy (Jumper's Knee)

Pain at the base of the patella, common in athletes involved in jumping and landing activities (basketball, volleyball, running). The patellar tendon is overstressed and develops micro-tears. Treatment: relative rest, eccentric exercises, cryotherapy. In refractory cases, PRP can be an effective option.

Meniscus Tears

Common after sports injuries—a sudden twist of the knee while the foot is planted. Symptoms: pain along the joint line, intermittent locking, a sensation that the knee is "giving way." Diagnosis: MRI. Treatment: depending on the type of tear—physical therapy, arthroscopy with repair or partial meniscectomy.

Anterior Cruciate Ligament (ACL) Tear

A classic injury in soccer, skiing, and basketball. It feels like a "pop" followed by significant swelling. The knee becomes unstable. It requires urgent evaluation and, in most cases, arthroscopic reconstruction followed by a rigorous recovery program (6-9 months).

Iliotibial (IT) Band Syndrome

Common in runners. Pain on the outer side of the knee that appears after a certain running distance and subsides with rest. The cause: repetitive friction of the iliotibial band over the lateral femoral condyle. Treatment: stretching, foam rolling, correcting running technique, appropriate footwear.

Osgood-Schlatter Disease

Specific to adolescents (12-15 years), especially athletes. Pain at the tibial tuberosity (the bony prominence below the knee), where the patellar tendon attaches. It is related to growth and usually resolves by adulthood. Treatment: activity modification, ice, stretching.

When Should You Be Concerned?

Not all knee pain in young people requires investigation. But it's worth an orthopedic evaluation if:

The pain persists for more than 2-3 weeks despite rest
The knee repeatedly swells
You feel instability, locking, or the knee giving way
The pain appeared suddenly after an injury
You cannot participate in your usual sports or activities

Important: Sports should not be abandoned—they should be adapted. Most causes of pain in young people respond excellently to physical therapy, biomechanical correction, and conservative treatment. Few require surgical intervention.

Can a Young Person Have Osteoarthritis?

Yes, but it's rare. Post-traumatic osteoarthritis can appear years after a joint fracture, an untreated meniscus tear, or neglected chronic instability. That's why correctly treating joint injuries in young people isn't just about the present—it's also about preventing osteoarthritis at 40-50 years old.

→ Learn more about knee osteoarthritis

Causes of Osteoarthritis in Young People

Post-traumatic osteoarthritis—the most common cause. Fractures, meniscus tears, or untreated ACL injuries can accelerate wear and tear by 10-20 years.

Obesity—chronic stress on weight-bearing joints.

Congenital dysplasia—joint abnormalities present from birth.

Inflammatory diseases—juvenile arthritis, psoriatic arthritis, gout.

Sports-related overuse.

Osteochondritis dissecans—in adolescents and young adults.

How Does It Manifest?

Pain during sports that no longer improves as it used to
Recurrent swelling
Stiffness
Painful crepitus (crackling sounds)
Reduced athletic performance

What Can You Do?

Prevention: Properly treat injuries, maintain a healthy weight, train smart, and don't ignore persistent pain.

Treatment: Physical therapy, PRP, arthroscopy. Joint replacement—extremely rare in young patients, a decision made with great care.

The Key Message

Osteoarthritis in young people is not inevitable—it is largely the consequence of factors that can be prevented or managed.

For context, see the dedicated page on knee arthroscopy, and if you want to go deeper, read aboutmeniscus tears and the treatment options.

Knee Pain in Young People — Common Causes and Solutions