07/11/2025
Did you know that nearly 25% of adults in the United States experience knee pain, making it one of the most common sources of joint discomfort? Whether it’s due to injury, overuse, or an underlying condition, persistent knee pain can take a toll on your mobility and daily life.
At Greater Pittsburgh Orthopaedic Associates (GPOA), we’re here to help. Serving patients across Pennsylvania, our team of specialists provides expert diagnosis and personalized treatment plans designed to ease knee pain and help you get back to living your best life.
Prevent knee pain by understanding its potential causes and addressing them early. Ready to take the first step toward recovery? Schedule an appointment today and let us help you regain your mobility.
Let’s dive into the top 10 reasons your knees might hurt—and what you can do to address them.
Top 10 Reasons Your Knees Hurt
Knee pain can arise from numerous causes, ranging from minor issues to more serious conditions. Understanding what might cause knee pain is crucial for finding the best way to treat it and alleviate discomfort. Below, we’ll explore the top 10 common reasons for painful knees and share advice on how to address each effectively.
1. Arthritis
Arthritis, including osteoarthritis and rheumatoid arthritis, is a leading cause of knee pain. Osteoarthritis occurs due to cartilage wear, while rheumatoid arthritis involves joint inflammation from an autoimmune condition. Both can reduce mobility and worsen without proper treatment. Early diagnosis and care are key to managing symptoms and maintaining an active lifestyle.
2. Tendinitis
Tendinitis occurs when tendons become inflamed, often due to repetitive motions or overuse during activities like running or sports. Common in athletes, it also affects individuals with repetitive work tasks. Symptoms include pain and swelling near the joint, especially during movement. Risk factors include aging, poor posture, or inadequate stretching. Rest, proper form, and strengthening exercises can prevent and manage this condition.
3. Knee Injuries
An injured knee is a common result of high-impact activities, sudden movements, or trauma. Issues like ligament tears, meniscus tears, or fractures can cause pain, swelling, and instability. Seeking prompt medical attention is essential to diagnose the injury and determine treatment, which could range from rest to surgery.
4. Overuse and Strain
Overuse injuries, such as runner's knee or tendinitis, develop from repetitive strain on muscles and joints. Initially, symptoms may be mild but can worsen over time. Contributing factors include poor movement mechanics and inadequate footwear. Addressing these injuries requires rest, strengthening exercises, and proper techniques.
5. Obesity
Excess weight places significant stress on the knees, contributing to painful knees and increasing the risk of osteoarthritis. For every extra pound of body weight, around four pounds of pressure is added to the knees, intensifying strain. Obesity-related inflammation may also harm joint tissues. Managing weight through diet and exercise can significantly reduce joint stress and improve mobility.
6. Bursitis
Bursitis refers to the inflammation of fluid-filled sacs (bursae) that cushion the joints. It often leads to pain, swelling, and stiffness in the knee. This condition can be triggered by repetitive movements, prolonged pressure, trauma, or other underlying conditions like arthritis. Treatment typically involves reducing stress on the joint and using anti-inflammatory measures.
7. Gout or Pseudogout
Gout and pseudogout are forms of arthritis that cause sudden, intense knee pain due to crystal deposits in the joint. Gout is linked to uric acid buildup, while pseudogout involves calcium pyrophosphate crystals. Both conditions result in pain, swelling, and limited movement. Proper treatment, dietary changes, and medical care are essential for symptom management.
8. Patellar Issues
Patellar problems, like a dislocated kneecap or patellofemoral pain syndrome, can interfere with knee mobility. A dislocated kneecap occurs when the patella shifts out of place, while patellofemoral pain syndrome results from overuse or misalignment. These conditions can restrict activities and may require physical therapy, bracing, or surgery for recovery.
9. Muscle Weakness or Imbalance
Imbalances or weakness in the muscles surrounding the knee, such as the quadriceps or hamstrings, can increase joint strain and lead to painful knees. Poor lifting techniques or repetitive actions may worsen these issues, causing conditions like patellofemoral pain or ligament strain. Strength training and proper biomechanics are effective in improving knee stability.
10. Aging and Wear-and-Tear
With age, the knee cartilage naturally wears down, often causing osteoarthritis, pain, and stiffness. This wear-and-tear can make daily tasks more challenging. However, staying active, maintaining a healthy weight, and practicing joint-friendly exercises can help keep your knees healthy for longer.
By addressing these common causes of knee pain, you can take steps to protect your joints and find relief from discomfort. Whether it’s an injured knee, overuse, or underlying conditions, understanding the root cause is essential for effective treatment and improved mobility.
