The pain in the middle finger of the right hand: 1. may be caused by stenosing tenosynovitis, or localized tendon sheath cysts, hard knots and masses can be palpated, and there is also a popping sound when moving. 2. rheumatoid arthritis and osteoarthritis can cause pain in the middle finger, especially in the morning when there is morning stiffness. The pain in the right middle finger is mainly due to insufficient blood supply or arterial system diseases, such as arterial embolism, arteritis, and also obvious numbness, and even hypothermia or warming zones are found when checking the body. Therefore, if the symptoms of pain in the right middle finger are not relieved within a short period of time, you must go to a regular hospital in time to improve the relevant examination and choose a reasonable treatment method.