Swollen finger joints are frequently the result of inflammation caused by an infection, injury, or disease. The swelling may be due to a chronic (persistent or recurrent) condition, like osteoarthritis, rheumatoid arthritis, or gout. Or, it may be due to acute (sudden and short-lasting), non-arthritis causes, like a fracture, infected cut, or a "jammed finger."
Source: Verywell health
