Lumbar puncture is a routine procedure frequently done in hospitalized patients. This tecnique is not free from complications. Here we bring a case of active bleeding from a lumbar arterie after a lumbar puncture that leads to hemorrhagic shock and retroperitoneal hematoma. Furthermore, we focus on developing non-surgical alternatives to cease active bleeding. Keyword: Lumbar puncture, Hemorrhagic shock, Retroperitoneal hemorrhage.