Elderly people with swollen finger joints may be related to degenerative joint hyperplasia and rheumatoid arthritis, and the cause of the disease should be clarified after timely consultation. 1. Degenerative joint hyperplasia: also known as osteoarthritis, the occurrence of this disease is related to a variety of factors leading to cartilage cell damage, cell necrosis, and finally bone hyperplasia. It is more likely to develop when there are risk factors such as violent injury, chronic blunt damage, endocrine metabolic disorders, obesity, bad habits, genetic factors, history of joint infections and so on. 2. Rheumatoid arthritis: associated risk factors and triggers include infections, such as EBV, HPV and other infections; smoking; family history of heredity, autoimmune abnormalities and so on. Joint swelling is accompanied by pain, morning stiffness, and impaired joint mobility. There may be other causes of swollen knuckles in the elderly, and it is recommended to seek timely medical attention to avoid delays.