Knee pain has many sources. It can follow a sudden injury, build up over years of repetitive load, come from arthritis, or start somewhere else entirely in the hip, foot, or lower back and show up at the knee. Because the knee carries so much of your body weight, even small changes in how you move can place extra strain on it. Care begins with finding out what is driving your specific pain, then focuses on restoring motion, easing pressure on the joint, and helping you get back to walking, stairs, and the activities you have been avoiding.