Understanding Knee Arthritis: Causes, Symptoms, Treatment & Prevention in Singapore

Knee arthritis is a common condition that affects individuals of all ages. This condition causes pain and stiffness in the knee leading to reduced mobility. As one of the leading causes of chronic knee pain, arthritis can significantly impact daily life, making simple activities like walking, climbing stairs, or standing for long periods challenging.

Understanding the causes, symptoms, and treatment options can help individuals manage knee arthritis effectively and improve their quality of life. This article provides a detailed breakdown of knee arthritis, its symptoms, prevention strategies, and treatment options available in Singapore.

What is Knee Arthritis?

Knee arthritis refers to the inflammation and degeneration of the cartilage in the knee joint. Cartilage is a smooth, protective layer that allows bones to move smoothly against each other. When the cartilage wears down, the bones rub together, causing pain, swelling, and stiffness. Knee arthritis occurs when the knee joint cartilage gets inflamed or thins due to some injury or general wear and tear of old age. It is most common among middle-aged and older individuals.

Types of Knee Arthritis

There are four main types of arthritis that commonly affect the knee:

Osteoarthritis (OA) – The Most Common Form

Osteoarthritis is the most common cause of knee arthritis that is caused by age-related wear and tear of cartilage over time. Its risk factors include age, obesity, previous knee injuries, genetics, and overuse of the knee joint. It presents as a gradual onset of knee pain, stiffness (especially in the morning), swelling, and difficulty moving.

Rheumatoid Arthritis (RA) – An Autoimmune Disease

Rheumatoid Arthritis is an autoimmune disease caused when the immune system mistakenly attacks the knee joint lining, causing inflammation. Genetics, smoking, and a compromised immune system all play a part in the progression of this disease. RA typically presents with joint pain, swelling, warmth, and stiffness, often affecting both knees simultaneously.

Post-Traumatic Arthritis (PTA) – A Result of Previous Injury

This type of knee arthritis is caused after a knee injury (e.g., ligament tears, fractures). You may have persistent pain, instability, and swelling in the knee that worsens over time. The risk factors for PTA include previous trauma, surgery, or repeated stress on the knee.

Gout-Related Arthritis

This is a kind of knee arthritis that is more common in men as compared to women. When there is excess uric acid buildup in the knee joint, it forms crystals that can cause sudden and intense pain in the knees. 

Common Symptoms of Knee Arthritis

Knee arthritis symptoms may vary based on the type and severity of the condition. However, the most common symptoms include:

• Pain: Usually felt in the knee joint, pain can range from a dull ache to sharp, intense discomfort, especially during movement.
• Swelling and Stiffness: Arthritis causes inflammation, leading to swelling and stiffness in the knee, which limits the joint’s flexibility and range of motion.
• Joint Instability: Many people experience a “giving out” sensation, making it difficult for them to put weight on the affected knee.
• Limited range of movement: Bending or straightening the knee becomes difficult due to pain or stiffness, making it hard to perform everyday activities.
• Crepitus: A cracking or popping sound when moving the knee.
• Warmth: Some individuals might feel a warm sensation around the knee joint
• Fatigue: Rheumatoid arthritis might also manifest in the form of fatigue along with other knee arthritis symptoms. 

Causes & Risk Factors

Several factors contribute to the development of knee arthritis:

• ​​Genetics: People with a family history of arthritis are more at risk of developing knee arthritis.
• Age: Ageing is one of the most significant factors, as wear and tear naturally progresses with age.
• Obesity: Excess weight adds stress to the knee joints, increasing the risk of osteoarthritis.
• Past Injuries: Knee injuries from any trauma, sports, or accidents can lead to arthritis years later.
• Gender: Hormonal differences and other factors make women more susceptible to some forms of arthritis, such as rheumatoid arthritis. Similarly, men are more at risk of developing gout-related arthritis.
• Other Factors: Diet, physical activity levels, and occupational strain can also be the cause of knee arthritis.
• Autoimmune Disorders: Conditions like rheumatoid arthritis cause the immune system to attack joint linings.

By identifying risk factors early, individuals can take preventive measures to delay the onset of arthritis. If you suspect a ligament tear, perhaps it is time to schedule an appointment with our orthopaedic specialist for ACL tear diagnosis and treatment.

Diagnosis of Knee Arthritis

To diagnose knee arthritis, an orthopaedic specialist or doctor may conduct the following tests.

• Physical Examination: The doctor examines the knee for swelling, tenderness, and limited range of motion.
• Imaging Tests: The doctor may order imaging tests like X-rays, which show cartilage loss, while MRI and CT scans provide detailed images of soft tissue.
• Lab Tests: Blood tests may be ordered to detect inflammation markers (helpful in rheumatoid arthritis and gout diagnosis) and uric acid levels for gout.
• Joint Fluid Analysis: Examines joint fluid for inflammation, infection, or crystals (e.g., in gout-related arthritis).

Treatment Options for Knee Arthritis in Singapore

Although there is no cure for arthritis, there are several treatments that can help manage pain and improve joint function:

Non-Surgical Treatment

During the initial stages of knee arthritis, your doctor may recommend one or more of the following conservative treatment options to manage the condition.

• Medications: Pain killers and anti-inflammatory medicines can help manage the pain and inflammation in the knee. In case of rheumatoid arthritis, the doctor may prescribe specific RA medications to treat the underlying condition.
• Physical Therapy: Physical therapy for knee arthritis comprise exercises that strengthen muscles around the knee, supporting joint stability. Effective exercises for knee arthritis include straight leg raises, leg stretch, knee flexion and extension, and bridges.
• Lifestyle Changes: Maintaining a healthy weight, using supportive devices like braces, and adopting joint-friendly activities can also manage knee arthritis pain and swelling.
• Diet and Supplements: Certain supplements such as Omega-3 fatty acids and glucosamine may help reduce inflammation.

Surgical Treatment

When knee arthritis reaches an advanced stage and conservative treatments such as medication, physical therapy, and lifestyle changes fail to provide adequate relief, the doctor may recommend surgical intervention. Knee surgery for arthritis aims to relieve pain, restore function, and improve the overall quality of life.

Arthroscopy

Arthroscopy is a minimally invasive surgery often used in the early stages of knee arthritis. During this procedure, a knee surgeon inserts a small camera (arthroscope) into the knee joint through tiny incisions. Through this procedure, the surgeon can attempt tp remove or repair torn cartilage, remove loose bodies, and treat inflamed joint lining.

Osteotomy

An osteotomy is a joint-preserving procedure used to realign the knee. In this surgery, the surgeon removes or reshapes a part of the bone to redistribute the weight on the knee joint and keep it away from the damaged part of the knee.

Partial Knee Replacement

Partial knee replacement, or unicompartmental knee arthroplasty, is a procedure that replaces only the affected part of the knee joint, while preserving the healthy sections. This procedure targets arthritis that affects only one part of the knee, leaving the rest intact.

Total Knee Replacement (Total Knee Arthroplasty)

Total knee replacement is the most common surgical procedure for advanced knee arthritis. In this procedure, the surgeon removes damaged cartilage and bone, replacing it with artificial components made from metal, plastic, or ceramic. These components work together to replicate the knee’s natural movement.

Cartilage Restoration Surgery

Through the cartilage restoration surgery, the surgeon aims to repair or regenerate damaged cartilage in the knee, often using techniques that stimulate cartilage growth or transplant healthy cartilage. The surgeon may take cartilage from some other part of the body and transplant it in the knee joint. Alternatively, the surgeon may use stem cell therapy to stimulate cartilage growth. 

Alternative Therapies

In some cases of knee arthritis, alternative therapies like the ones discussed below, can also be effective in managing pain and making daily activities easier. 

• Acupuncture: Provides relief for some through targeted pressure points.
• Platelet-Rich Plasma (PRP) Therapy: PRP injections may reduce pain and encourage healing.
• Stem Cell Therapy: Still experimental but showing promise in cartilage regeneration.

Pain Management Techniques

Since knee arthritis cannot be cured completely, patients should look for techniques to manage pain and swelling so that their daily-life activities are affected to the least. The following pain management techniques can prove to be effective. 

• Home Remedies: Alternating hot and cold compresses, gentle stretching, and low-impact exercise can reduce pain.
• Assistive Devices: Knee braces and orthotic shoe inserts improve stability in the knee joint and alleviate pain.
• Mind-Body Techniques: Meditation, yoga, and deep breathing can help manage pain levels.
• Proper Footwear: Supportive shoes can reduce strain on knees, providing additional comfort and pain relief.

How to Prevent Knee Arthritis?

The following tips can help prevent knee arthritis or delay its onset in case of at-risk individuals. 

• Maintain a Healthy Weight: Reducing body weight helps relieve knee joint stress.
• Regular Low-Impact Exercise: Engage in swimming, cycling, and walking to strengthen muscles without overstraining joints.
• Proper Body Mechanics: Use good posture when lifting or bending to protect knees from undue stress.
• Healthy Diet: Include anti-inflammatory foods like fish, fruits, and vegetables in your diet to support joint health.
• Prevent Injuries: Wear protective gear during sports and strengthen muscles to reduce injury risk.

How to Reduce The Risk of Arthritis in the Knees?

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Arthritis may occur to anyone, not just the elderly. Here are some tips to reduce the risk of Arthritis:

• Regular exercise
• Maintain healthy weight
• Protect joints from injury

When to See a Doctor for Knee Arthritis?

Seek medical attention if you experience:

• Persistent knee pain lasting more than a few weeks.
• Severe swelling, warmth, or redness around the knee joint.
• Difficulty walking, standing, or performing daily activities.
• Sudden knee instability or joint locking.

Timely intervention can prevent further joint deterioration and improve quality of life.

Get Expert Knee Arthritis Treatment in Singapore

Knee arthritis is a challenging condition, but with early diagnosis, appropriate treatment, and lifestyle changes, it is possible to manage symptoms and live an active life. Understanding your arthritis type, symptoms, and treatment options allows you to make informed decisions, improving your quality of life. If you’re experiencing symptoms, consult our specialised orthopaedic doctor in Singapore for personalised advice and start your journey toward pain relief and better mobility. Whether you need non-surgical options or advanced procedures, our experienced medical team ensures comprehensive care tailored to your needs.

If you are experiencing discomfort in your knee for reasons besides arthritis, it is best to speak with our doctors regarding knee pain treatment. For those dealing with sports injuries, our sports injury treatment is tailored to help you recover quickly and safely.

Here are some tips to heal bruises quickly and prevent muscle cramps. 

Frequently Asked Questions

What is the most common type of knee arthritis?

The most common type of knee arthritis is osteoarthritis (OA), which occurs due to age-related wear and tear of the knee joint cartilage. It leads to pain, stiffness, and swelling, especially after prolonged activity or rest.

What are the early signs of knee arthritis?

Early signs of knee arthritis include:

• Mild knee pain after activity
• Morning stiffness lasting less than 30 minutes
• Clicking or grinding sensations in the knee
• Swelling or tenderness around the joint

How is knee arthritis diagnosed?

Doctors diagnose knee arthritis using:

• Physical Examination: Assessing joint movement and symptoms.
• X-rays: Checking for cartilage loss and bone changes.
• MRI Scans: Providing a detailed view of soft tissues and cartilage.
• Blood Tests: Identifying rheumatoid arthritis (if suspected).
• Joint Fluid Analysis: Checking for inflammation or infections.

Can knee arthritis be cured?

There is no cure for knee arthritis, but treatments can manage pain symptoms, slow the progression, and improve quality of life. Many people find relief through physical therapy, lifestyle adjustments, and, when necessary, surgical intervention.

Is knee arthritis the same as rheumatoid arthritis?

No, knee osteoarthritis (OA) is caused by wear and tear, while rheumatoid arthritis (RA) is an autoimmune disease where the body’s immune system attacks the joints. Both conditions cause knee pain and stiffness but require different treatments.

When should I consider surgery for knee arthritis?

Surgery is usually considered when non-surgical treatments fail to provide relief, and knee arthritis significantly impacts daily activities or quality of life. Consult an orthopedic surgeon to discuss the most suitable surgical options for your condition.

What is the best exercise for knee arthritis?

Some exercises that are effective for knee arthritis include low-impact exercises like:

• Swimming & Water Therapy: Reduces stress on joints while strengthening muscles.
• Cycling: Improves knee mobility and reduces stiffness.
• Leg Strengthening Exercises: Squats, lunges, and leg lifts improve knee support.
• Stretching & Yoga: Enhances flexibility and reduces stiffness.

Always consult a physiotherapist before starting a new exercise routine.

Will knee arthritis worsen over time?

Knee arthritis often progresses with time, especially if untreated. However, lifestyle modifications, regular exercise, weight management, and treatment options can slow its progression and help manage symptoms effectively.

What dietary changes can help with knee arthritis?

A diet rich in anti-inflammatory foods, like fruits, vegetables, omega-3 fatty acids (found in fish), and antioxidants, may help reduce inflammation. Avoiding processed foods, sugars, and excessive saturated fats can also aid in managing arthritis symptoms.

Can losing weight help with knee arthritis?

Yes, losing weight can significantly reduce the strain on the knee joints, lessening pain and slowing the progression of knee arthritis. Every kilogram of weight lost reduces the load on the knee by approximately four kilograms during activities.

Is knee arthritis hereditary?

Genetics can play a role, particularly in rheumatoid arthritis and some forms of osteoarthritis. If there’s a family history of arthritis, it may increase the risk, though lifestyle factors often have a significant impact on the condition’s development.

What is the role of physical therapy in managing knee arthritis?

Physical therapy can strengthen the muscles around the knee, improve flexibility, and reduce pain. It focuses on exercises that support joint function, helping to relieve symptoms and enhance mobility over time.

Are knee braces helpful for arthritis?

Knee braces can provide support and alleviate pressure on the knee joint, reducing pain. They may be particularly helpful for people with moderate arthritis, offering additional stability during physical activities.

When should I see a doctor for knee arthritis?

See a specialist if you experience:

• Persistent knee pain lasting more than 2-3 weeks
• Swelling, redness, or warmth around the knee
• Difficulty walking or performing daily activities
• Knee instability or locking sensation