_:vb50955571 . _:vb50955571 . _:vb50955571 "A vein disease that is characterized by swollen, twisted veins visible just under the surface of the skin."^^ . _:vb50955571 "url:http://www.nlm.nih.gov/medlineplus/varicoseveins.html"^^ . _:vb50955571 . _:vb50955571 . _:vb50955571 . _:vb50955571 "url:https://www.nhlbi.nih.gov/health/health-topics/topics/vv/"^^ . _:vb50955571 .