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

9. Home Care, Splints, and Medications That Can Ease Discomfort
There are several approaches to managing the discomfort associated with Heberden’s nodes and osteoarthritis. Over-the-counter pain relievers, such as acetaminophen or nonsteroidal anti-inflammatory drugs (NSAIDs), can help reduce pain and inflammation.
Splints may be recommended to support continue reading …