Exanthema in pediatric dermatology-A confusing galaxy of myriad diseases

In the medical literature, exanthem is the name given to a widespread rash that is usually accompanied by systemic symptoms such as fever, malaise, and headache. The combination of these factors, for example, the mobility of human populations, the onset of new diseases such as COVID and the continuous availability of new drugs, make today the interpretation of the exanthems more and more difficult. In this article, we will revise briefly the conceptual problems that, during many years, have contributed to hinder its comprehension. At the end, two tables will help physicians to orientate in this field.