title: Varicose veins are caused by defective valves in the veins.
authors.forename: G T
authors.initials: GT
authors.lastname: Watts
mesh_terms: D001775:Blood Circulation; D005260:Female; D006801:Humans; D011247:Pregnancy; D014648:Varicose Veins / Q000209:etiology*; D014680:Veins / Q000503:physiopathology*; D014690:Venous Pressure