The Bonner Vein Days are a specialist congress for phlebologists (vein specialists). For two days, the participants will discuss the latest developments in this field in the context of scientific lectures, workshops and symposia. Congress President Prof. Dr. med. Eberhard Rabe, Bonn, is Emeritus President of the International Society for Phlebology. He is the editor of the specialist journal vasomed. Extended summaries of selected lectures will be published in “vasomed – The specialist journal for vascular diseases” issue 2/2021.