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A member asked:
I have dark veins in my right arm, when i lift my arm the veins go away, when i put it down they get really dark. should i be concerned?
3 doctors weighed in across 2 answers
Normal: As long as the veins empty and collapse upon elevation they are acting normally. If they remained distended, then some sort of obstruction would be suspected. Since venous blood doesn't have as much oxygen as arterial blood, the veins would have darker color.
Answered 9/28/2016
4.3k views
Position change.: What you describe is normal and there is no reason to be concerned. When the arms are elevated above the heart, the blood drains out of the veins and they reduce in size. The opposite occur when the arms are placed below the heart.
Answered 5/19/2018
4.3k views
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