Knee pain | Symptom Checker
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What causes knee pain? 27 possible conditions

See a list of possible causes in order from the most common to the least.


Osgood-Schlatter Disease

Osgood-Schlatter disease is an inflammation of the area just below the knee. Learn about the symptoms, diagnosis, and treatment for this disease.

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Juvenile Rheumatoid Arthritis

Juvenile rheumatoid arthritis is the most common type of arthritis in children. Learn about juvenile rheumatoid arthritis symptoms, diagnosis, and treatment.

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Reactive Arthritis (Reiter's Syndrome)

Reactive arthritis is a type of arthritis triggered by an infection in the body.

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Chondromalacia, also known as "runner's knee," is a condition where the cartilage on the undersurface of the patella (kneecap) deteriorates and softens.

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Rheumatic Fever

Rheumatic fever is a complication of strep throat. If it's left untreated, it can cause permanent damage to your heart. Find out about symptoms and treatment.

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Kawasaki Disease

Early treatment is key to treating Kawasaki disease, especially in children. Learn how to recognize the symptoms of Kawasaki disease and when to see a doctor.

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Legg-Calve-Perthes' Disease

Legg-Calve-Perthes disease is when the top of the femur, called the ball, doesn't receive enough blood.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.