When you are with elderly people, you can see many of them have bulging veins on their hands, arms and legs. In fact, “veins” are also called blood vessels, which refer to the blood vessels that send blood back to the heart. The main physiological factors and pathological factors caused by the prominent veins, the following is a specific analysis: 1, the obvious physiological veins are generally more obvious, more thin body shape and fair skinned people, their fat layer is thin, coupled with the blood vessels are more prominent, fair skin, will lead to the obvious veins, and some hands long-term non-exercise people, hand blood is not fluid leading to prominent veins, or some excessive exercise People, blood vessels will slowly become thicker, so the veins will be more obvious. 2, pathological bruises protrude especially if they have not appeared in the recent past and the blood vessels are particularly prominent and swollen, it may be caused by the presence of disease. It is common for the following reasons: (1) wasting Recent wasting due to various reasons can lead to thinning of the skin and subcutaneous tissue, thus bringing out the veins that were not obvious before. In this case, attention should be paid to finding the cause of the wasting (less eating, less absorption, more elimination). (2) Blocked venous return in the upper limbs When the venous blood return is blocked and the pressure is increased, the veins often appear on the surface of the body as bulges, varicosities, distortions and discoloration, and the blockage is serious enough to form arterial varicosities. If there is thrombosis or compression in the large upstream veins, it will lead to obstruction of blood return to the downstream veins and increase the intravascular pressure resulting in increased venous pressure and varicose vein-like changes. In addition, some patients in the early stages of right heart failure may have elevated systemic venous pressure due to decreased blood elimination from the right heart, resulting in elevated upper extremity lower extremity pressure. In addition, some tumor patients will also have elevated venous pressure and venous prominence due to compression of the upper extremity veins, but most of the time it occurs in one limb. (3) thick blood, high blood sugar and lipids The bruises on the back of the hands are often seen as an important signal of vascular sclerosis, arteriosclerosis, the blood vessels will be green and thick, indicating that there are problems with blood circulation, the blood vessels will protrude, especially the older middle-aged and elderly people should pay attention to their hands. Be especially careful of hyperlipidemia, hyperglycemia and atherosclerosis. (4) Decreased venous valve function, varicose veins Mostly seen in the lower extremities, especially in patients with varicose veins, but some elderly people have decreased venous valve function and droop their hands for a long time, which can lead to veins protruding. (5) Phlebitis Phlebitis is mostly associated with painful swelling. There are many causes of venous thrombosis, such as trauma, surgery, infusion, malignancy and other causes. So pay attention to whether there are precipitating factors as well as the symptomatic situation to make the diagnosis. 3.What should I pay attention to when I have visible bruises? If it is a relatively thin group of people and long-term, without any discomfort, you can continue to observe. However, if the recent emergence of veins in the hands, generally will not be for no reason, are representative of some parts of the body problems, need to go to the hospital to check the blood vessels, especially the above-mentioned parts, the more obvious the veins protrude, the darker the color, the more indicates that the vascular health may have been harmed, you can see the cardiovascular medicine or vascular surgery, you can check the blood sugar, blood lipids, blood pressure You can check blood glucose, blood pressure and blood pressure, and do ultrasound of the arteries and veins of both upper limbs.