What condition is characterized by swollen veins?

The condition characterized by swollen veins is varicose veins. This occurs when veins become enlarged, dilated, and overfilled with blood, which often leads to a lumpy, bluish appearance that can be seen just under the skin. Varicose veins primarily affect the legs and are a result of weakened valve function in the veins, causing blood to pool and the veins to stretch.

In this condition, the blood flow becomes inefficient, which can lead to discomfort, pain, or leg fatigue. Factors contributing to the development of varicose veins include age, genetics, pregnancy, and prolonged standing or sitting, as these can all increase pressure in the veins.

While other conditions listed can involve blood vessel issues, they do not specifically refer to swollen veins in the same way that varicose veins do. Hemorrhoids are a type of varicose vein that occurs in the rectal area, arteriosclerosis refers to the thickening and hardening of arteries, and an aneurysm involves a bulge in the wall of an artery rather than swelling of veins.