Varicose veins also called varicose or varicosities, are swollen blood vessels that appear just under the skin’s surface. Varicose veins occur when the veins get enlarged or overfilled with blood. Although varicose veins can cause discomfort, they are usually harmless.They generally have bluish-purple hues and are found in the legs and feet. Varicose veins are relatively a common condition. Researchers have found out that around 25 percent of all adults suffer from this condition.