The authors carried out an epidemiological study on a group of 10032 patients with chronic venous insufficiency, composed of 2686 males (26.77%) and 7346 females (73.23%). The case report is divided into varicose diseases (83.30%) and sequelae of deep vein thrombosis (16.70%). As well as the relationship between sex and age is considered rate of dermatological complications, with regard both to the type of venous diseases (65.54% varicose and 34.46% post-thrombotic) and to their clinical manifestations. As well as any family connection, various environmental factors are taken into account such as the patient's work, noxae iatrogenic, pregnancy and obesity.