When does knee pain actually need surgery?

The typical journey for knee pain in India goes like this: you see an orthopaedic doctor, get an X-ray, hear you have some arthritis or a meniscal issue, and get offered medication, injections, or surgery. Physiotherapy is often mentioned as an afterthought, if at all.

This matters because international evidence overwhelmingly supports trying physiotherapy before surgery for most knee conditions. In countries like the UK, Australia, and Scandinavian nations, patients must complete a structured course of physiotherapy before being considered for knee surgery. This is not to create delays. It is because a significant percentage of patients improve enough with physiotherapy that they no longer need or want surgery.

In India, this step is frequently skipped. Knee replacement surgery has become a major revenue centre for hospitals, and the decision to operate is sometimes driven more by the X-ray than by whether the patient has exhausted conservative options.

Osteoarthritis (Grade 1 to 3): The most common cause of knee pain in adults over 45. Exercise-based physiotherapy is the internationally recommended first-line treatment, effective in 60 to 70% of patients at reducing pain to manageable levels. Surgery should only be considered after at least 3 to 6 months of proper exercise.

Patellofemoral pain (front of knee pain): Extremely common in young adults and runners. Caused by muscle imbalances and movement patterns, not structural damage. Responds very well to targeted strengthening, particularly of the quadriceps and hip muscles. Surgery for this condition has poor outcomes compared to physiotherapy.

Meniscal tears in people over 40: Degenerative meniscal tears are present in about 30% of people over 50 with no symptoms. Multiple large trials (including the FIDELITY trial) have shown that arthroscopic surgery for degenerative meniscal tears is no better than physiotherapy alone. Despite this evidence, arthroscopy for meniscal tears remains one of the most commonly performed surgeries in India.

ACL tears in active individuals: If you have torn your anterior cruciate ligament and want to return to sports involving cutting, pivoting, or jumping, ACL reconstruction is usually recommended. However, even here, a period of pre-surgical physiotherapy (prehab) and the option of non-surgical management with physiotherapy alone are worth discussing with your surgeon.

Grade 4 OA with failed conservative treatment: If you have severe osteoarthritis with significant daily pain and functional limitation that has not responded to 3 to 6 months of proper physiotherapy and lifestyle modification, total knee replacement is a reasonable option. The key words are "failed conservative treatment," meaning you have genuinely tried a structured exercise program, not just taken painkillers.

Acute locking or mechanical symptoms: If your knee genuinely locks (not just stiffness but inability to straighten or bend past a point due to something blocking the joint), this may indicate a displaced meniscal tear or loose body that may need surgical intervention. This is different from the general pain and swelling that characterize most knee complaints.

Traumatic injuries in young patients: Acute meniscal tears from sports injuries in young people (under 35) that cause locking or significant instability may benefit from surgical repair, as opposed to degenerative tears in older adults where surgery has been shown to be no better than PT.

What specific problem will the surgery fix? The answer should be clear and specific, not "clean up the joint" or "smooth things out." If the answer is vague, it suggests the surgery may not have a clear target.

What are the realistic outcomes? Ask for success rates with numbers, not just "most patients do well." For knee replacement, 85 to 90% of patients are satisfied, which means 10 to 15% are not. For arthroscopy in degenerative conditions, the evidence suggests outcomes are no better than physiotherapy.

Have I adequately tried physiotherapy first? Not "I was told to do some exercises" but a structured program of 2 to 3 sessions per week for at least 6 to 8 weeks with a qualified physiotherapist. If you have not done this, you have not tried conservative treatment. What you have tried is painkillers.

What happens if I do not have surgery? In many cases, the answer is that the condition will not get dramatically worse in the short term, and you have time to try conservative treatment properly. The exception is acute injuries with instability or locking.

Before making a surgical decision for any non-emergency knee condition, commit to a proper 3-month trial of evidence-based conservative treatment. This means working with a physiotherapist on a structured strengthening program (particularly quadriceps, hamstrings, and hip muscles), addressing weight if it is a contributing factor, and gradually increasing your activity levels.

This is not about "waiting and seeing." It is an active treatment approach that, for most knee conditions, has better evidence behind it than surgery. If you improve (and 60 to 70% of patients do), you have avoided an operation. If you do not improve, you go into surgery in better physical condition, which improves your surgical outcomes.

Nuprana offers structured online physiotherapy programmes for knee conditions. Your physiotherapist assesses your knee via video, designs a progressive strengthening plan, and guides you through each stage with regular sessions and daily home exercises.