A more urgent concern is deep vein thrombosis, or DVT, which occurs when a blood clot forms in a deep vein. It can cause pain, warmth, swelling, or changes in skin color, although symptoms can vary and may sometimes be subtle.
Prominent veins can also occur when pressure builds up within the body’s venous system. In some cases of congestive heart failure, increased pressure can cause veins in areas such as the neck, arms, or legs to become more noticeable.
