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A member asked:
My jugular vein expands and bulges on the right side above my collar bone only when i strain. i've gotten a ct scan. what are my concerns?
5 doctors weighed in across 2 answers
Normal: Neck veins distend when we lie with our head lower than our heart or when we strain. With straining, the pressure within the chest increases and the blood flow through the neck veins decrease resulting in them enlarging. This is normal. Why you notice only one side is probably just anatomical variation.
Answered 6/20/2013
5.1k views
Normal physiology: Veins expand and contract based on total blood volume and differences in pressure. When you strain, you increase the pressure in your chest and abdomen, and the blood cannot compress, so it fills veins in your legs and neck. Then when you relax, the blood flows back. If you hung upside down, gravity would pull blood toward your head, and the neck veins would get larger as well.
Answered 1/2/2015
5k views
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