What Are Some Causes of Pain in the Left Knee?

These other issues include tendonitis, osteoarthritis, Osgood-Schlatter disease, iliotibial band syndrome, bursitis, medial plica syndrome and bone chips. According to Healthline, doctors diagnose knee issues with x-rays and other physical exams. This may include assessing the patient’s ability to move the knee and the level of pain the patient is experiencing. The symptoms of knee pain vary but common signs are pain when bending the knee and swelling, notes WebMD.