The commonest sort of arthritis, osteoarthritis is due to progressive wearing down of cartilage over time. This restrictions the array of movement and triggers pain, stiffness, weak point and swelling of your knee. This is an autoimmune illness that causes the tissue throughout the joint to be inflamed and thickened. https://www.theorthopaedicandpainpractice.com/knee-pain-in-older-patients-ages-55/