The aim of the study was to determine the diagnostic usefulness of thermal imaging as tool to find quantitative parameters in lower-limb primary chronic venous diseases and insufficiency of superficial veins. There were significant differences obtained in thermal maps of lower extremities between patients and healthy. The correlations were obtained between temperature parameters counted from thermal imaging and duplex scanning. Such results also suggest that thermovision diagnostics may be useful as a complementary and first of all objective method that can be used in the diagnosis of chronic venous diseases in the lower extremities. It may suggest that thermovision may be used as a screening method or together with an ultrasound diagnosis in different superficial veins disorders.