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MusculoskeletalICD-10: M25.56About 25% of adults experience frequent knee pain

Knee Pain

Also known as: Knee Injury, Knee Osteoarthritis, Patellofemoral Pain

Knee pain is one of the most common musculoskeletal complaints affecting all ages and activity levels. It can result from injuries, mechanical problems, arthritis, or overuse. Treatment varies from physical therapy and rest to surgical intervention depending on the cause.

Symptoms

Pain and tenderness in or around the knee
Swelling and stiffness
Weakness or instability (giving way)
Popping or crunching noises with movement
Inability to fully straighten or bend the knee
Redness and warmth to the touch
Difficulty bearing weight

Causes

  • Osteoarthritis (wear and tear)
  • ACL, MCL, or meniscus tears from sports injuries
  • Patellar tendinitis (jumper's knee)
  • Bursitis
  • Runner's knee (patellofemoral pain syndrome)
  • Gout or septic arthritis

Risk Factors

  • Obesity
  • High-impact sports
  • Age-related cartilage degeneration
  • Previous knee injury
  • Muscle weakness or imbalance
  • Occupations requiring repetitive knee stress

Diagnosis

  • Physical examination with range of motion and stability tests
  • X-ray for bone structure and arthritis
  • MRI for soft tissue injuries
  • Ultrasound for tendon and bursa evaluation
  • Joint aspiration if infection or crystal arthritis is suspected

Treatment

  • RICE protocol (Rest, Ice, Compression, Elevation)
  • Physical therapy to strengthen surrounding muscles
  • NSAIDs or acetaminophen for pain
  • Corticosteroid or hyaluronic acid injections
  • Arthroscopic surgery for meniscus or ligament repair
  • Total or partial knee replacement for severe osteoarthritis

Prevention

  • Maintain a healthy weight
  • Strengthen quadriceps and hamstrings
  • Warm up properly before activity
  • Wear appropriate footwear
  • Avoid sudden increases in exercise intensity

When to See a Doctor

  • Knee pain with significant swelling or deformity
  • Unable to bear weight on the affected knee
  • The knee locks, catches, or gives way repeatedly
  • Pain persists more than a few days despite rest and ice

Frequently Asked Questions

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Medical Disclaimer: This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.

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