Swelling of the right finger is considered to be related to trauma or exertion, venous thrombosis, rheumatoid arthritis and other factors. 1. Trauma or exertion: frequent use of the hands or heavy labor or hand trauma, can cause local soft tissue injury can lead to hand swelling, accompanied by pain, activity is limited. 2. Venous thrombosis: local venous thrombosis of the hand, due to the obstruction of blood return, causing finger swelling, color Doppler ultrasound can be clear. 3. Rheumatoid arthritis: rheumatoid arthritis in the right hand, with morning stiffness, swelling and pain in the joints as the main manifestations, which can lead to joint deformity and dysfunction in severe cases. Laboratory tests such as increased sedimentation rate, positive rheumatoid factor and imaging tests can help to confirm the diagnosis. There may be other reasons for the swelling of the right finger, if the swelling persists and cannot be relieved, it is recommended to consult a doctor in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.