Postphlebitic syndrome and varicose veins
Deep vein thrombosis occurs when blood clots form and obstruct the deep veins of the leg which transport 90% of the venous blood in the leg. The thrombus gets embedded into the vein wall damaging it and destroying the veins valves. Eventually, very often the body works to restore the flow but sometimes the valves remain injured.
The result is a dilatation and pressure increase in the deep veins of the leg that is also eventually transmitted to the main trunks of the superficial veins and its branches. Finally, the increased pressure reaches to the skin veins resulting in a persistently swollen leg, skin discoloration and breakdown and pain. This is known as the post-phlebitic syndrome.
Traditionally, this varicosities secondary to a post-phlebitic syndrome was left untreated, however if they are removed, the degree of deep reflux can decrease and as a result the venous hypertension and its consequences.