The rash with painful and erythematous nodules

Erythematous painful cutaneous nodular lesions are associated with a host of disorders that may erupt acutely as a generalized or localized dermatitis or be associated with chronic and/or recurrent illnesses. This review discusses such disorders presenting with painful nodular lesions and attempts to provide a systematic approach to their clinical diagnosis. (C) 2018 Elsevier Inc. All rights reserved.