Recent prominent veins on the dorsum of the hands may be related to physiologic reasons such as fat loss, or pathologic reasons such as varicose veins and venous thrombosis of the upper extremities. 1. Physiological reasons: If you have recently lost fat, the subcutaneous fat on the back of the hand will also be reduced, and the phenomenon of prominent veins may occur. 2. Pathological reasons: if the venous valves on the back of the hand are dysfunctional, it can lead to varicose veins and the phenomenon of prominent veins; if the upper extremity venous thrombosis, so that the venous reflux is blocked, it can lead to prominent veins on the back of the hand. It is recommended to go to regular hospitals for timely consultation to clarify the causes of the recent prominent veins on the back of the hands, and if treatment is needed, standardized treatment should be carried out under the guidance of the doctor to avoid delaying the condition.