When should I see a doctor for knee pain?

See a doctor if: knee pain persists beyond 2 weeks, there is significant swelling or redness, you cannot bear weight, the knee locks or gives way, or pain is worsening despite rest. Sudden traumatic injuries (falls, sports) should be assessed the same day.

What are the most common causes of knee pain in adults?

The most common causes are osteoarthritis (wear and tear), meniscus tears, ligament injuries (ACL, PCL), patellofemoral syndrome (runner's knee), bursitis, tendinitis, and rheumatoid arthritis. Diagnosis requires clinical examination and imaging (X-ray, MRI).

Is knee replacement always necessary for knee pain?

No. Most knee pain is managed non-surgically with physiotherapy, medications, injections, and activity modification. Knee replacement is considered only for severe osteoarthritis that has not responded to conservative treatment and significantly affects quality of life.

Knee Pain: Common Causes, Symptoms & When to See a Doctor

Knee pain is one of the most common musculoskeletal complaints — affecting people of all ages, from young athletes to elderly adults with osteoarthritis. In India, knee pain is the leading reason patients visit orthopaedic surgeons, with osteoarthritis alone affecting an estimated 15% of the population above 60. Despite how common it is, knowing when to see a doctor and what treatment is appropriate can be confusing.

Not all knee pain requires surgery. Over 80% of knee pain is managed successfully with non-surgical treatments including physiotherapy, medications, and injections.

Anatomy of the Knee

The knee is the largest and most complex joint in the body. It connects the thigh bone (femur), shin bone (tibia), and kneecap (patella). Key structures include:

Cartilage: Smooth protective covering on bone ends; absorbs shock
Menisci: Two C-shaped cartilage pads (medial and lateral) that cushion and stabilise
Ligaments: ACL, PCL, MCL, LCL — bands that hold bones in place
Tendons: Connect muscles to bones; the patellar tendon is most commonly affected
Bursae: Fluid-filled sacs that reduce friction

Common Causes of Knee Pain

Osteoarthritis Wear and tear of cartilage over time. Common in adults over 50. Pain worse after activity, morning stiffness, grating sensation.

Meniscus Tear Sudden twisting injury or gradual degeneration. Causes pain, swelling, clicking, and locking of the knee. Common in athletes and older adults.

ACL Injury Anterior cruciate ligament tear — usually a sports injury (football, volleyball). Causes sudden severe pain, "pop" sound, and instability.

Patellofemoral Syndrome Pain around and behind the kneecap. Common in runners and young people. Worsened by stairs, squatting, prolonged sitting.

Bursitis Inflammation of bursae (fluid sacs). Causes swelling and warmth over the knee. Often from kneeling or direct impact.

Rheumatoid Arthritis Autoimmune joint inflammation affecting both knees symmetrically. Morning stiffness lasting over 1 hour, joint swelling, fatigue.

Gout Uric acid crystal deposits in the joint causing sudden intense pain, redness and swelling. Often worse at night.

Tendinitis Inflammation of patellar tendon (jumper's knee). Pain below the kneecap worsened by jumping and running. Common in athletes.

When Is Knee Pain an Emergency?

Go to emergency immediately if: The knee appears visibly deformed after injury | There is severe swelling within minutes of injury | You cannot bear any weight | The knee locks and cannot straighten | There is numbness or cold/pale foot after knee trauma (possible blood vessel injury)

When Should I See an Orthopaedic Doctor?

See a specialist if your knee pain:

Has persisted for more than 2 weeks without improvement
Is accompanied by significant swelling, warmth, or redness
Causes difficulty walking, climbing stairs, or performing daily tasks
Is associated with a "pop," giving way, or locking sensation
Woke you from sleep
Occurred after a sports injury or fall
Has not responded to paracetamol, rest, and ice

Diagnosis: What to Expect

Your orthopaedic doctor will conduct a thorough history and clinical examination. Investigations may include:

X-ray — first-line imaging; shows bone changes, joint space narrowing, and alignment
MRI — gold standard for soft tissue — cartilage, menisci, ligaments, tendons
Ultrasound — useful for tendons, bursae, and guided injections
Blood tests — if inflammatory arthritis (RA, gout) is suspected

Non-Surgical Treatments

Most knee pain is treated without surgery:

Physiotherapy: Muscle strengthening (quadriceps, VMO), flexibility, proprioception — the most effective long-term treatment for most knee conditions
Medications: Paracetamol, NSAIDs (diclofenac, ibuprofen) for pain and inflammation
Intra-articular injections: Corticosteroid injections for acute flare; hyaluronic acid (viscosupplementation) for osteoarthritis
Weight management: Every 1 kg of body weight lost reduces knee joint load by approximately 4 kg. Critical for osteoarthritis management.
Knee brace / orthotics: Offloading braces, medial wedge insoles, patellar taping for specific conditions

When Is Surgery Needed?

Surgery is considered when non-surgical treatment has failed and quality of life is significantly affected:

Knee replacement (total or partial) — for severe osteoarthritis. SAI Hospital offers robotic-assisted knee replacement for superior precision.
Arthroscopic surgery — Meniscus repair/trimming, ACL reconstruction, loose body removal
EpiSurf cartilage resurfacing — for younger patients with focal cartilage damage seeking to avoid total replacement
Osteotomy — realigning the knee for selected younger patients with deformity

Knee Pain Getting in the Way of Life?

See our expert orthopaedic team at SAI Hospital for accurate diagnosis and the right treatment for your knee condition.

Book an Orthopaedic Consultation