Bone spurs: bone spurs are added bits of bone which come to feel like really hard lumps and may variety around the joint. Rheumatoid factor and anti-cyclic citrullinated peptide are commonly used to monitor for rheumatoid arthritis, although raised serum uric acid levels might be in line with gouty arthritis. https://www.theorthopaedicandpainpractice.com/all-you-need-to-know-about-osteoarthritis/