Varicose veins are a common condition affecting many people, causing swollen and twisted veins in the legs that can be unsightly and cause discomfort. There are several synonyms for varicose veins, including varicosity, venous insufficiency, spider veins, and venous reflux disease. Spider veins, or telangiectasias, are small, web-like red or blue veins that appear quite close to the surface of the skin, whereas the larger, twisted veins are known as varicosities. Vein problems can be caused by factors such as genetics, pregnancy, and obesity, as well as standing or sitting for long periods, but treatment options are available to help manage symptoms and prevent further complications.