Right middle finger pain is not necessarily cancer; cancer can be difficult to diagnose or identify through pain symptoms alone. Right middle finger pain is commonly associated with tenosynovitis, which can lead to increased resistance to tendon sliding, which further leads to increased joint stress. This can sometimes manifest as pain in the middle finger tip joint or metacarpophalangeal joint. There may also be a bump on the metacarpal side of the metacarpophalangeal joint of the middle finger, and in some people there is significant pain on pressure. If the condition is more severe, phenomena such as joint movement jamming may occur. In addition, right middle finger pain can be seen in tendon tumors, such as giant cell tumor of the tendon sheath. There can also be inflammatory changes in the joint, which may be aseptic inflammation or rheumatoid inflammation. It is necessary to go to the hospital in time, under the guidance of the doctor for blood sampling, physical examination and other tests to clarify the diagnosis.