veins are blue and visible?
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The scientists found that the veins near the surface re-emitted tiny amounts of red light, but lots of blue light. This means the colour blue is more noticeable. The second factor was how much oxygen the blood was carrying. Most of the oxygen in blood is carried by very large molecules called haemoglobin.
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Skin Complexion and Thickness This is a normal part of the aging process. Sometimes, the veins are apparent because they're closer to the surface of the skin. The veins in the legs – the veins responsible for carrying small portions of blood to the heart – tend to be closer to the skin.
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Blood is always red, actually. Veins look blue because light has to penetrate the skin to illuminate them, blue and red light (being of different wavelengths) penetrate with different degrees of success.
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Why we get visible leg veins We develop them when tiny, one-way valves inside the veins weaken. In healthy veins, these valves push blood in one direction — back to our heart. When these valves weaken, some blood flows backward and accumulates in the vein. Extra blood in the vein puts pressure on the walls of the vein.
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Magnetic Resonance Venography, MRV A specific type of MRI that examines the veins without the overlying tissues being visible. Typically, this exam will require an injection of a contrast material to enhance the visibility of the veins.
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In this Article Varicose veins are large, raised, swollen blood vessels that twist and turn. They usually develop in the legs and can be seen through the skin. Spider veins are smaller, red, purple, and blue vessels that also twist and turn. Spider veins are easily visible through the skin, as well.
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Varicose veins are swollen and enlarged veins that usually occur on the legs and feet. They may be blue or dark purple, and are often lumpy, bulging or twisted in appearance. Other symptoms include: aching, heavy and uncomfortable legs.
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As you get older, your skin gets thinner and loses elasticity, making your veins more visible. Also, as you age, your valves in your veins weaken. This can cause blood to pool in your veins for a longer period of time.
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However, purple or blue skin can also indicate a restriction of blood flow to the feet, and this can be a symptom of an underlying health condition. Conditions that can affect blood circulation in the feet include Raynaud's disease, PAD, lupus, diabetes, and frostbite.
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Blue lips may indicate a type of cyanosis caused by lower levels of oxygen in the red blood cells. Blue lips may also represent high levels of an abnormal form of hemoglobin in the bloodstream (similar to bluish discoloration of the skin).
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In natural light, check the appearance of your veins beneath your skin. If your veins appear blue or purple, you have a cool skin tone. If your veins look green or a greenish blue, you have a warm skin tone. If you can't tell whether or not your veins are green or blue, you probably have a neutral skin tone.
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A purple or blue tongue could be a sign that your blood isn't delivering enough oxygen to your body's tissues. Or, that oxygen-depleted blood — which is dark red, rather than bright red — is circulating through your arteries. The blueish discoloration that occurs due to this is called cyanosis.
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Varicose veins occur when the valves within the veins stop working properly and allow blood to backflow. The blood pools in the area below the affected valve causing the vein to enlarge and stretch. Varicose veins appear under the skin as bluish-green lines, which may bulge out or appear twisted and contorted.
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The blood going out to your body in the arteries is full of oxygen, which makes the blood bright red. But the blood coming back from your body in the veins is darker because your body parts have used up the oxygen in the blood. That's why veins look purple or blue.
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Your blood gets its red color from oxygen. Your blood has this molecule in it called hemoglobin. ... when you're looking at your veins and arteries, the ones that look "blue" have blood without oxygen in them. The ones that look "red" have blood with oxygen in them.
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Age. As you get older, your skin gets thinner and loses elasticity, making your veins more visible. Also, as you age, your valves in your veins weaken. This can cause blood to pool in your veins for a longer period of time.
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Your veins are a vital part of the inner workings of your body, even if they sometimes appear unsightly from the surface. It is completely normal to see those little blue vessels through your skin. And for them to be bulging out of it when your blood pressure is up from a strenuous workout or a frustrating traffic jam.