Visible veins on the arms may be caused by heredity, heavy physical activity and other factors, which are generally normal phenomena and do not need to worry too much. The veins refer to the walls of the venous blood vessels, which are located on the surface of the skin, the surface is thin, and can appear in the arm, back of the hand, back of the foot and other parts of the body. Congenital arm veins are obvious in normal people, especially in those who are too thin, their arm veins are more obvious, which are normal phenomena and do not need to take special treatment measures; or engaged in long-term sports activities, as well as heavy physical labor, which may also lead to the expansion of local blood vessels, appearing in the arm veins obvious situation. If the above situations are not accompanied by other uncomfortable symptoms, they are normal phenomena and do not need to worry too much. If the patient in the case of obvious arm veins, accompanied by veins raised, twisted, tenderness, soreness and other symptoms, is an abnormal phenomenon, should be taken seriously. Once such a situation occurs, it is recommended that the patient go to a regular hospital in a timely manner, for relevant examinations, so as to identify the cause of the disease. Once diagnosed, patients should actively cooperate with doctors to take relevant treatment measures.