The right hand is suddenly swollen: 1, it may be caused by acute hand lymphangitis in the right hand, due to bacterial infection causing lymphatic reflux obstruction, the patient will have right hand edema, swelling, pain and local pressure. 2, there may also be phlebitis in the right hand, patients with venous thrombosis due to venous reflux obstruction, there will be right hand swelling, heavy pressure, improve the right upper limb ultrasound examination can determine the location of the hand venous thrombosis. 3. Patients with rheumatoid arthritis of the right hand will experience swelling and pain in the right hand, with pain mainly in the small joints of the hand, and the swelling and pain will be heavier in the morning, and going to the hospital for laboratory tests for increased blood sedimentation, higher anti-O test and positive rheumatoid factor will help confirm the diagnosis. Therefore, in case of sudden swelling of the right hand, if trauma is ruled out and there is no significant relief within a short period of time, it is necessary to go to a regular hospital in a timely manner, improve the relevant examination, clarify the cause, and choose a reasonable treatment method so that the symptoms of swelling of the right hand can be effectively controlled.