Larger veins and spider veins may recur. Or, it may seem that a previously injected vessel has recurred, when, in fact, a new spider vein has appeared in the same area. Since spider veins and varicose veins are genetically determined diseases, it is probable that problem veins will recur in some area. Most patients can expect an interval of 2 years or more before additional injections are necessary.

Though these blood vessels carry blood, they are abnormal and are not necessary, perform no useful function, and also can lead to painful thrombo phlebitis or significant bleeding.

Most often varicose veins are related to hereditary tendency, however, prolonged standing, trauma, obesity, pregnancy, birth control pills and post-menopausal hormone replacement can play important roles in the development of spider and varicose veins.

Spider veins occurring on the face or elsewhere may be treated.