WHY would a varicose vein cause gynecomastia??? A varicose vein has nothing to do with hormones.Common Causes * Puberty * Exposure to estrogen hormone * Exposure to androgen hormones * Marijuana use * Tumors * Genetic disorders * Chronic liver disease * Kidney failure * Side effects of some medicationsRead about it here: http://www.nlm.nih.gov/medlineplus/e...cle/003165.htm