My grandma has these hard bumps forming on her finger joints near the nails. Why is this spreading?

Osteoarthritis is a chronic condition characterized by the breakdown of cartilage, the flexible tissue that cushions the ends of bones in a joint. When this cartilage deteriorates, the bones begin to rub together, causing pain, swelling, and stiffness.

In response, the body often forms osteophytes, or bone spurs, as a way to try to repair the damage and increase the surface area of the joint. These osteophytes manifest as the hard nodules or bumps on the joints, such as Heberden’s nodes on the DIP joints. This process not only affects the joints’ function but can also lead to visible changes in the hands’ shape.