Erythema nodosum leprosum (ENL) is characterized by tender erythematous nodules, accompanied by fever, malaise, arthralgia, and systemic complications. Atypical clinical manifestations have been reported such as pustular, bullous, ulceration; livedo reticularis; erythema multiforme-like reaction; and Sweet's syndrome (SS)-like presentation. We reported a case of ENL reaction presenting as SS-like reaction in a borderline lepromatous leprosy patient.