The great number of patients suffering from varicosis and its complications urgently requires an active therapy. This treatment simultaneously represents a prophylaxis against the development of thrombophlebitis, thrombosis, leg ulcers and hypostatic congestion dermatoses. The varicosclerosation is not bound to instrumental preliminary examinations and therefore feasable without great efforts in the outpatient department. After testing the patency of the deep veins and taking into consideration the indications and contraindications the varicosclerosation achieves good results and is nearly free from side-effects. The percentage of relapses is caused by the constitutional weakness of the connective tissue and must be taken into account from the very beginning. General practitioners and specialists of internal medicine should make use of this method, since dermatologists and surgeons alone are not able to cover the quantitative demand.