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Symptom Checker

Step 4: Read and complete the decision guide to learn more about your symptoms.

Knee Pain

The following are conditions that may cause knee pain:

Click on the links that were suggested by the Decision Guide or any others that interest you.

Ankylosing spondylitis  - a form of arthritis with prominent back pain

Anterior cruciate ligament (ACL) injury

Arthritis associated with Inflammatory Bowel Disease  - a form of arthritis that may accompany Crohn's disease or ulcerative colitis

Bursitis  - inflammation of a bursa near the knee

Chondromalacia  - a softening or irritation of the cartilage under the knee cap

Fibromyalgia  - a cause of diffuse pain

Fracture  - a broken bone

Gout - a form of arthritis caused by uric acid crystals

Joint infection, including Lyme disease

Knee sprain - stretched or torn ligaments near the knee

Osteoarthritis - a form of wear and tear, or degenerative, joint disease

Posterior cruciate ligament (PCL) injury

Pseudogout - a form of arthritis caused by calcium crystals

Psoriatic arthritis  - a form of arthritis associated with psoriasis

Reiter's syndrome  - a form of arthritis that may follow urinary, genital or bowel infection

Rheumatoid arthritis - a cause of arthritis affecting multiple joints

Spondyloarthropathy- see Ankylosing spondylitis, Arthritis associated with Inflammatory Bowel Disease, Psoriatic arthritis, or Reiter's syndrome  above

Tendonitis - tendon inflammation

Torn meniscus  - a form of cartilage damage or injury

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