What does a painful swollen knuckle on the index finger indicate?
1. Introduction A painful swollen knuckle on the index finger typically indicates localized joint inflammation caused by degenerative osteoarthritis, an autoimmune condition such as rheumatoid arthritis, or acute mechanical trauma to the ligaments or tendons. The index finger, functioning as a primary digit for pinching, pointing, and gripping, is subjected to immense repetitive biomechanical stress … Read more