Sweet’s syndrome, also known as acute febrile neutrophilic dermatosis, is an uncommon dermatological condition characterized by sudden onset, painful, erythematous/violaceous papules, plaques and ulcers, and specific histopathologic findings. Ulcers commonly present on the trunk, neck, hands and typically respond to systemic corticosteroid treatment. Here, we present a case of a 63-year-old woman with Sweet’s syndrome that presented with a thumb ulcer resembling a soft tissue infection. The thumb lesion was refractory to management for an infection and tissue pathology was consistent with a Sweet’s lesion. The patient was intolerant to first line therapy of oral prednisone, but the lesion was initially responsive to topical clobetasol and maintenance therapy of oral dapsone. This case emphasizes the importance of a careful history, examination, workup and maintaining a broad differential diagnosis to prevent misdiagnosis. We also demonstrate the potential effectiveness of initial topical treatment for problematic Sweet’s lesions when systemic steroids are contraindicated.