With more and more patients suffering from field cancerisation, an alternative for repeated surgery for the diagnosis and treatment of non-melanoma skin cancer is becoming necessary. Although surgery remains the gold standard for treatment of non-melanoma or keratinocyte skin cancer, it also has its downside. Surgery leaves scars and nowadays the cosmetic outcome of therapy is becoming increasingly important. Since many cases can effectively be managed without surgery, the possibilities of non-surgical therapy are gaining popularity, particularly in low malignancy tumours. This reader-friendly clinical guide offers treatment options for the growing group of these patients. It describes the current state-of-the art for non-surgical treatment of this type of skin cancer, and gives factual knowledge to beginners and new inspirations to experts.