2 doctors weighed in:

What does it mean when the veins in my feet are popping out?

2 doctors weighed in
Dr. John Landi
Phlebology
1 doctor agrees

In brief: Multiple reasons

Veins return blood back to the heart and can carry a large volume of blood.
Depending on many factors including levels of hydration, genetics, outside temperature and even physical activity, the size of the veins will vary. Another important function of the veins is to help control body temperature and this too will affect vein size. Also with aging, veins enlarge as tissue volume decreases.

In brief: Multiple reasons

Veins return blood back to the heart and can carry a large volume of blood.
Depending on many factors including levels of hydration, genetics, outside temperature and even physical activity, the size of the veins will vary. Another important function of the veins is to help control body temperature and this too will affect vein size. Also with aging, veins enlarge as tissue volume decreases.
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