Dear Pnugent swollen left knee and pain can be due to injury to ligament, tendon; bursitis; osteoarthritis or
rheumatic arthritis etc. You can take antiinflammatory medicines like acetaminophen or ibuprofen and use ice
pack. Avoid running up and down stairs .Doing knee exercise will help in stretching and strenghtening the
muscles that support the knee. Proper footwear is also important, especially if walking or running on hard
surfaces. Keep your weight under control, it will reduce stress on the knee.You need to get a X-ray of knee or
MRI for diagnosis. Get in touch with a Orthopedician. Take care.