Knee Pain: Common Causes

Knee pain is one of the most common complaints across all age groups, from athletes nursing a sports injury to older adults dealing with the slow wear of arthritis. The knee is a complex joint that bears significant weight and stress daily, which makes it particularly vulnerable to a wide range of issues. Not all knee pain requires medical attention, but knowing which symptoms warrant a visit to an orthopaedic specialist can prevent a minor issue from becoming a long-term problem.

This article covers the most common causes of knee pain, available treatment options, and when to see a specialist.

Understanding the Knee Joint

The knee is the largest joint in the body, formed where the thighbone (femur), shinbone (tibia), and kneecap (patella) meet. It relies on a network of cartilage, ligaments, tendons, and muscles to provide both stability and a wide range of motion. Because so many structures work together, knee pain can originate from several sources, including bone, cartilage, ligaments, tendons, or the surrounding muscles, which is part of why an accurate diagnosis matters before starting treatment.

Common Causes of Knee Pain

Osteoarthritis

One of the most common causes of chronic knee pain, particularly in adults over 50. Osteoarthritis occurs when the cartilage cushioning the knee joint gradually wears down, leading to bone-on-bone friction, pain, stiffness, and swelling that typically worsens with activity and improves with rest in the earlier stages.

Ligament Injuries

The knee relies on several ligaments for stability, with the anterior cruciate ligament (ACL) and medial collateral ligament (MCL) among the most commonly injured. Ligament injuries often cause sudden pain, swelling, and a feeling of instability or giving way in the knee.

Meniscus Tears

The meniscus is a piece of cartilage that cushions and stabilises the knee joint. Tears can occur from sudden twisting movements during sports or gradually from age-related degeneration. Symptoms often include pain, swelling, stiffness, and a sensation of the knee locking or catching during movement.

Tendinitis

Inflammation of the tendons around the knee, often called jumper's knee when it affects the patellar tendon, is common among athletes who run or jump. It typically causes pain just below the kneecap that worsens with activity.

Bursitis

Inflammation of the small fluid-filled sacs that cushion the knee joint is often caused by repetitive kneeling, overuse, or direct trauma. This typically results in localised swelling, warmth, and tenderness around the knee.

Patellofemoral Pain Syndrome

Often referred to as runner's knee, this condition involves pain around or behind the kneecap and is commonly linked to overuse, muscle imbalances, or improper movement patterns during repetitive activities such as running or cycling.

Gout and Other Inflammatory Conditions

Gout, caused by a build-up of uric acid crystals in the joint, can cause sudden, severe knee pain, swelling, and warmth. Other inflammatory conditions, such as rheumatoid arthritis, can also affect the knee, typically alongside other joints.

Fractures

Trauma from falls, accidents, or sports injuries can result in fractures around the knee joint, usually causing immediate, severe pain, swelling, and an inability to bear weight on the affected leg.

When Is Knee Pain Considered Serious?

Certain signs and symptoms suggest knee pain should not be managed at home and warrant prompt evaluation:

- Inability to bear weight on the affected leg
- Significant swelling that develops rapidly
- Visible deformity around the knee
- A popping sound at the time of injury followed by pain and swelling
- The knee gives way or feels unstable
- A knee that locks or is unable to fully straighten or bend
- Fever combined with knee pain and swelling
- Pain that persists or worsens despite rest, ice, and over-the-counter pain relief
- Knee pain following a significant fall, accident, or direct impact

These signs may indicate ligament tears, fractures, infections, or other conditions that require prompt diagnosis and treatment.

When to See an Orthopaedic Specialist

While minor knee discomfort from overuse often resolves with rest, ice, and time, consult an orthopaedic specialist if you experience:

• - Knee pain lasting more than a few weeks despite home care
• - Recurring episodes of knee pain or swelling
• - Difficulty performing daily activities such as walking, climbing stairs, or standing up from a seated position
• - Knee pain accompanied by any serious warning signs
• - A previous knee injury that has not fully healed or keeps recurring
• - Chronic joint pain affecting quality of life or sleep

How Is Knee Pain Diagnosed?

• - Physical examination – Assessing range of motion, stability, swelling, and points of tenderness.
• - X-ray – Useful for detecting bone-related issues such as fractures and osteoarthritis.
• - MRI – Provides detailed imaging of soft tissue structures including ligaments, tendons, and cartilage.
• - Blood tests – May be used when inflammatory or infectious causes are suspected.
• - Joint fluid analysis – In certain cases, fluid may be analysed for infection, gout crystals, or inflammatory markers.

Knee Pain Treatment Options in Malaysia

Treatment depends heavily on the underlying cause and generally follows a staged approach.

Conservative Treatment

• - Rest and activity modification
• - Ice and elevation
• - Physiotherapy
• - Pain relief and anti-inflammatory medication
• - Bracing or support devices

Minimally Invasive Treatment

• - Corticosteroid injections
• - Hyaluronic acid injections
• - Arthroscopy

Surgical Treatment

For more severe or persistent cases such as significant ligament tears, advanced arthritis, or fractures, surgical options may be recommended, ranging from ligament reconstruction to partial or total knee replacement.

Arthritis and Joint Pain: A Closer Look

Arthritis remains one of the most common long-term causes of knee pain, particularly osteoarthritis.

• - Weight management
• - Low-impact exercise such as swimming or cycling
• - Physiotherapy
• - Medication or injections
• - Surgical intervention when conservative measures are no longer effective

Since arthritis is a progressive condition, early management generally helps preserve joint function for longer and may delay more invasive treatment.

Preventing Knee Pain

• - Maintain a healthy weight
• - Warm up properly before exercise or sports
• - Strengthen the muscles surrounding the knee
• - Use proper exercise and sports techniques
• - Wear supportive footwear
• - Avoid sudden increases in activity intensity or duration
• - Address minor knee discomfort early

Frequently Asked Questions

Is it normal for knees to hurt with age?

Some degree of joint wear is common with age, but persistent or worsening knee pain should not simply be accepted as normal and should be evaluated.

Can knee pain go away on its own?

Minor knee pain from overuse or mild strain often improves with rest and home care. Persistent or worsening symptoms require professional evaluation.

Do I need an MRI for knee pain?

Not always. Many cases can be assessed through clinical examination and X-ray. MRI is generally reserved for suspected soft tissue injury or unclear findings.

At what point does knee pain require surgery?

Surgery is generally considered when conservative treatments no longer provide adequate relief or when significant structural damage is present.

Key Takeaways

Medical Disclaimer

This article is intended for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional regarding any medical condition, symptoms, or treatment decisions. Seek prompt medical attention if you experience severe or worsening symptoms.