Most of the bulging blood vessels on the back of the hands are normal venous vessels, but there may be phlebitis, venous thrombosis and other phenomena.
1. Normal venous blood vessels: If you are usually engaged in heavy physical labor and have a thin body, it is possible that the blood vessels on the back of the hand often bulge, in addition, strenuous exercise in the summer can also lead to venous blood vessel filling, which is manifested as bulging of the blood vessels on the back of the hand.
2. Phlebitis: Bacterial infection and trauma may cause inflammation of the veins, which may lead to bulging of the blood vessels on the back of the hands.
3. Venous thrombosis: Mostly due to abnormal blood viscosity, blood flow is slowed down to form thrombus, which also leads to obstruction of venous return and causes bulging of blood vessels on the back of hands.
If it is a physiological phenomenon that does not require treatment, if it is a disease that causes the blood vessels to bulge, you need to go to the hospital in time for diagnosis and treatment.