Snapshot A 25-year-old woman with bipolar disorder managed by lithium presents to her dermatologist for a new onset painful rash in her inguinal area. She reports multiple lesions that seem like acne but are much larger than any acne she’s ever had. On physical exam, she has multiple deep-seated, tender, and erythematous nodules and abscesses that were openly draining purulent fluid. She is immediately given a warm compress and oral antibiotics. She is counseled about this life-long disease and is advised to stop taking lithium and find an alternative medication. Introduction Clinical definition login to view 2 more bullets Epidemiology login to view 15 more bullets Etiology login to view 1 more bullet Pathogenesis login to view 7 more bullets Prognosis login to view 5 more bullets Presentation Symptoms login to view 2 more bullets Physical exam login to view 6 more bullets Studies Labs login to view 1 more bullet Diagnostic criteria login to view 3 more bullets Differential Folliculitis Vasculitis Acne vulgaris Treatment Conservative login to view 6 more bullets Medical login to view 22 more bullets Complications Scarring and fibrosis login to view 2 more bullets Poor quality of life and psychologic burden Secondary superinfection