Varicose veins are blood vessels which have become dilated, twisted, and swollen. Although they can occur anywhere in the body, they primarily affect the legs and feet. You can identify among the signals an itching, throbbing or burning feeling, which get acute at night after a hard day of work, especially if you have walked a lot or been standing up for long hours.As many as forty million Americans suffer from varicose or spider veins. About 50 to 55 percent of American women and 40 to 45 percent of American men suffer from some form of vein problem. Varicose veins affect one out of two people age 50 and older. Women generally experience varicose veins more frequently than men.