If you experience knee pain after sitting with your legs bent, it may be caused by arthritis, tendonitis, bursitis, or patellofemoral pain. If your knees hurt when sitting, it may be from sitting ...

Ankle bursitis occurs when one or more of the bursae sacs in the ankle become inflamed. This can cause pain, swelling, and difficulty moving the ankle. Bursae are small, fluid-filled sacs ...

Knee pain while running is often due to runner's knee, IT band syndrome, and knee bursitis. Most running-related knee injuries are the result of increasing your mileage or pace too quickly.