<unk>  veins are associated with multiple risk factors. The most important one is a family history of<unk>  veins. Other risk factors include increasing age, female sex, prolonged periods of standing, Pregnancy, Obesity. These risk factors can lead to the incompetence of venous valves.
Varicose veins risk factors
Deep vein thrombosis risk factors
Gangrene risk factors
Deep vein thrombosis causes
Portal vein thrombosis risk factors
Varicose veins causes
Stent thrombosis risk factors
Deep vein thrombosis triggers