The risk factors for superficial vein thrombosis (OVT) are close to those for venous thromboembolism (VTE). However, the risk of these superficial cutaneous vein thromboses is considerably higher if there are already varicose veins (defective venous valves with a subsequent standing blood column and pathological backflow into the lower leg veins!). This reflux increases the pressure in the deep veins to over 100 mmHg - and with that alone there is a high risk of thrombosis. Now a virus is added, which obviously accumulates and multiplies in all inner walls of the vessels. This also applies to the vascular wall of varicose veins!
