Varicose veins are big, twisted veins that bulge on the skin's surface; these veins are very close to the skin's surface, so they can be seen quickly and look unattractive. In many people, these veins do not cause any pain or discomfort. Still, it causes severe pain and discomfort in many people, and treatment is necessary for them. Although it is required to treat these veins, they may cause more severe problems.