Infective panniculitides are infections of the subcutaneous fat induced by any kind of micro-organism. They have rarely been considered as an entity within the spectrum of the panniculitis. Because of the increase in the immunosuppressive population, cutaneous infections’ incidence is growing and atypical clinical presentations can be found. In this article, we analyze the etiology, clinical picture, histopathologic findings, diagnostics tools, and treatment of the more relevant infective panniculitis. We divide them according to the causative micro-organisms in bacterial, mycobacterial, fungal, and viral panniculitis.