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 ...

An injury or arthritis most likely causes pain outside the knee. A doctor can determine the cause based on your other symptoms and the results of imaging tests. Pain on the outer (or lateral ...

Medically reviewed by Scott Zashin, MD Knee pain at night is a common condition caused by injury, arthritis, bursitis, gout, and more. When it happens at bedtime, it can also lead to insomnia, which ...