Bleeding after a Roux-en-Y gastric bypass (RYGB) is an uncommon complication in bariatric surgery. The reported incidence of gastrointestinal bleed after a RYGB ranges between 0.8% and 4.4%. Bleeding can arise from anywhere in the intestinal tract including the excluded small bowel and the gastric remnant. Bleeding most commonly occurs at the gastrojejunal anastomosis, though all other areas of the intestinal tract must be considered. Failure to diagnose and manage the bleeding promptly can result in a prolonged length of stay and increased morbidity/mortality. Postoperative bleeding can be categorized based on time of onset. Early bleeding occurs <30 days since primary operation, while late bleeding occurs >30 days since primary operation. By determining the time of onset of the bleeding, either <30 days since operation or >30 days since operation, you can start to narrow the location of the bleed. The bleeding is also categorized based on the bleeding site (intraluminal versus intra-abdominal). It is imperative to know the most common sites that may be bleeding. Knowing the location of the bleed will help identify the treatment plan for each patient.