Medically Reviewed by Dr Wang Lushun
Senior Consultant Orthopaedic Surgeon
MBBS (S’pore), MRCS (Edinburgh), MMed (Ortho), FRCS (Ortho) (Edinburgh)
Knee pain is one of the most common musculoskeletal complaints among adults of all ages. Whether you are an active athlete, a busy professional, or an older adult managing age-related changes, knee discomfort can interfere with daily activities such as walking, climbing stairs, exercising, or even sleeping.
Sometimes the pain is mild and settles with rest. In other cases, it may indicate an underlying injury or joint condition that requires medical attention. Because the knee is a complex weight-bearing joint, even seemingly minor symptoms can sometimes point to a more significant issue.
Understanding what is normal, what is not, and when to seek medical advice can help prevent long-term complications and support a faster recovery.
Knee pain can happen for many reasons, ranging from temporary muscle strain to more serious joint damage. In many cases, the cause depends on how the pain started — whether it came on suddenly after an injury, or gradually over time.
Some common causes of knee pain include:
Ligaments connect bones to each other and provide stability to the knee. Sudden twisting, pivoting, or direct impact during sports can lead to ligament injuries such as:
These injuries often occur during activities like football, basketball, skiing, or running.
The meniscus is a piece of cartilage that acts as a shock absorber between the thigh bone and shin bone. A sudden twist or deep squat can cause it to tear. Degenerative meniscus tears are also common in older adults due to age-related cartilage changes.
Knee osteoarthritis is a degenerative joint condition caused by gradual wear and tear of cartilage. It is more common in individuals over 50, but can also affect younger people with previous injuries or high-impact lifestyles. Symptoms often develop slowly and may include stiffness, swelling, and pain that worsens with activity.
Often referred to as “runner’s knee,” this condition causes pain around the front of the knee, particularly when climbing stairs, squatting, or sitting for long periods.
Inflammation of the tendons around the knee, such as patellar tendonitis, is common in athletes and individuals who frequently jump or run.
While many of these conditions can be managed conservatively, certain symptoms may indicate a more serious issue than meets the eye.
It can be difficult to tell whether knee pain is mild, temporary, or something that requires medical attention. However, the following signs suggest that your knee pain should not be ignored.
If you experience intense pain immediately after a fall, twist, collision, or sports injury, it may indicate a ligament tear, fracture, or internal damage.
You should seek medical attention if:
These symptoms are commonly associated with ACL tears or other major ligament injuries.
Swelling that occurs within a few hours of injury may indicate bleeding within the joint, often due to ligament tears or fractures. Persistent swelling that does not improve with rest, ice, and elevation over several days should also be evaluated by a doctor.
If your knee gets stuck, locks in position, or catches during movement, it may be a sign of a meniscus tear or loose cartilage fragments within the joint. Mechanical symptoms such as these usually do not resolve on their own and require proper assessment.
If your knee feels like it may buckle or collapse while walking, this may indicate ligament damage or significant joint weakness. Persistent instability increases the risk of further injury.
Any visible deformity, such as the knee appearing out of alignment or misshapen, may indicate a fracture or dislocation and requires urgent medical care.
If knee pain is accompanied by redness, warmth, fever, or chills, this could indicate an infection within the joint. Septic arthritis is a medical emergency and requires immediate treatment.
Minor strains and overuse injuries often improve within a few days to two weeks with rest and self-care. If your knee pain persists beyond two to three weeks, worsens, or interferes with daily activities, it is advisable to consult an orthopaedic specialist for further evaluation.
Not all knee pain requires urgent medical attention. Mild cases may include:
In such cases, the RICE method (Rest, Ice, Compression, Elevation) may help relieve symptoms. However, if symptoms do not improve or recur, a proper assessment is still recommended.
Many patients delay seeking medical advice because they hope the pain will resolve on its own. While this is sometimes true, ignoring persistent or worsening symptoms can lead to further joint damage, chronic instability, accelerated cartilage wear, reduced mobility, and more complex treatment later on. Early diagnosis allows for timely intervention, which may include physiotherapy, bracing, medications, injections, or surgical treatment if necessary.
If you decide to see an orthopaedic specialist for knee pain, the consultation typically includes:
Your doctor will begin by asking when your knee pain started, whether it followed an injury or developed gradually, and what activities make it better or worse. They will also ask about symptoms such as swelling, stiffness, locking, or instability, as these can provide important clues about the structures affected. Your occupation, exercise habits, and any history of previous knee injuries will also be considered.
Next, your orthopaedic specialist will examine your knee to assess movement, stability, swelling, and areas of tenderness. They may perform specific tests to check for ligament injuries or meniscus tears, as well as evaluate overall alignment and muscle strength. This helps determine whether the pain is due to overuse, inflammation, joint degeneration, or structural damage.
Depending on the findings, imaging may be recommended. X-rays are useful for assessing fractures, joint alignment, and signs of arthritis, while MRI scans provide a clearer view of ligaments, cartilage, and the meniscus. In some cases, ultrasound may be used to assess tendons or fluid build-up. These scans help confirm the diagnosis and guide treatment decisions.
Treatment for knee pain depends on the underlying cause and severity of the condition, and these may include:
Many knee conditions can be managed without surgery, such as:
Surgery may be recommended if:
Minimally invasive arthroscopic procedures are commonly used for ligament and meniscus injuries. For advanced arthritis, knee replacement surgery may be considered. An experienced orthopaedic surgeon will discuss the risks, benefits, and expected recovery timeline with you.
Certain individuals are more prone to more serious knee conditions, including:
If you fall into any of these categories and develop persistent knee pain, early assessment is especially important.
You should consider seeing a specialist if you experience severe pain after injury, rapid swelling, inability to bear weight, instability or giving way, locking or catching sensations, pain lasting more than two to three weeks, or knee pain that affects your daily life.
Seeking professional care does not necessarily mean you will need surgery. In fact, many conditions can be treated successfully with conservative measures when diagnosed early.
If you are unsure whether your knee pain is serious or what your treatment options are, please contact us to make an appointment with experienced knee specialist, Dr Wang Lushun, today. A proper diagnosis provides clarity, reassurance, and a personalised treatment plan tailored to your needs; and addressing problems early ensures you can stay active and pain-free for years to come.
MBBS (S’pore), MRCS (Edin), MMed (Ortho), FRCS (Ortho) (Edin)
With over 20 years of experience, Dr Wang Lushun is an orthopaedic surgeon who specialises in treating a wide range of sports injuries and musculoskeletal conditions. He has in-depth experience in minimally invasive surgery and advanced robotic surgery. Dr Wang provides orthopaedic care to athletes and everyday individuals throughout their journey to recovery.
