Stiff fingers often result from arthritis, but there may be other causes. They include tenosynovitis, which causes trigger finger, carpal tunnel syndrome, or an injury. Stretching, home remedies, and medical treatment may help.When your hand or fingers are stiff, you may also experience pain and a decreased range of motion.A person may experience stiff fingers at a specific time of the day, which may signify a certain condition. This may help a doctor make a diagnosis. To determine the best trea