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Varicose veins are enlarged, twisted superficial veins, usually found in the legs.
They can cause:
* Aching
* Heaviness
* Itching
* Swelling
* Throbbing
* Leg fatigue
Varicose veins are common and often more of a comfort or cosmetic issue than an emergency.
However, medical advice is appropriate if they begin causing significant pain, skin changes, bleeding, ulcers, or repeated inflammation.
## 10. New Veins Around the Abdomen or Chest
Newly visible veins across the abdomen or chest can sometimes occur naturally, especially with low body fat or pregnancy.
However, a sudden network of unusually enlarged veins in these areas may occasionally reflect changes in blood flow deeper inside the body.
If this appears suddenly or is accompanied by abdominal swelling, pain, breathing difficulty, or other unexplained symptoms, it is worth being evaluated.
## 11. Sudden Hand or Arm Swelling
A prominent vein on the hand is usually harmless.
But sudden swelling of one hand or arm together with visible veins can require assessment, especially if there is:
* Pain
* Redness
* Warmth
* Heaviness
* Numbness
Possible causes range from injury and infection to venous obstruction.
## Can Dehydration Make Veins More Visible?
Sometimes.
When you lose fluid, tissues beneath the skin may appear less full, allowing veins to stand out more clearly.
But visible veins alone are not a reliable sign of dehydration.
Better clues include:
