What Are The Signs of Knee Arthritis? Knee arthritis is a common condition that can affect walking, climbing stairs, sitting, and other daily activities. It happens when the cartilage inside the knee joint gradually wears down, causing pain and stiffness. Knowing how to identify the warning signs of knee joint https://medium.com/@sapanahospital/what-are-the-signs-of-knee-arthritis-f62cb3ca8437