Complications associated with abdominal drains include infection, distortion and/or perforation of visceral tissue, and herniation of a nearby organ. Herniation and / or eventration through drain sites are rarely seen. We present two cases describing herniation of visceral organs through the drain site. During both operations, rubber drains (11 mm in diameter, worked by closed-gravity method) were placed into the Douglas pouch to detect bleeding and the drain insertion sites on the fascia were 13 mm in length. In both cases, there had to be additional surgical interventions due to strangulation. We suggest that unnecessary drainage should be abandoned. When necessary, smaller drains and smaller incisions (<10mm) should be used for the drain insertion, especially when used for warning of postoperative bleeding. Fascial defects should be digitally explored to check for any organ entrapment. Defects should be repaired immediately after the removal (even when it is <10mm in diameter).