Symptom Checker
Step 4: Read and complete the decision guide to learn more about your symptoms.
Knee Pain
Based on your answers (you are age 45 or younger, other joints are bothering you, your painful knee is not swollen and there is locking and/or giving way of the knee), there are a number of possible causes of knee pain. More than one may be present at the same time) including:
rheumatoid arthritis or a related condition (for example, spondyloarthropathy)
cartilage damage and/or ligament damage
fibromyalgia
chondromalacia.
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