Phlebology is the science of the veins ("phlebo" is the Ancient Greek word for "vene"). One in the western civilization common clinical picture is the various forms of varices which can vary from couperose varicose veins to severe widespread so-called truncal varices.
With modern non-invasive diagnostic methods (e.g. colorflow-sonography) such varicose veins get recognized. Intricacies (leg vein thrombosis, on-the-surface phlebitis) can be identified and with modern medications (heparin shot) treated.
From the internist's point of view, a careful evaluation of the blood coagulation and thrombosis factors is necessary as well as a decision of whether surgical alternatives or a conservative treatment (coumadin, surgical hoses etc.) are indicated.