A 58-year-old female with the prior history of diabetes mellitus (DM) presented with nausea, malaise, and abdominal pain of two days duration. Also, in the past, she was treated for a necrotized rectum from a retroperitoneal infection leading to a colostomy in the left lower quadrant (LLQ) of the abdomen. The physical examination findings were highly suggestive for a parastomal hernia. As a part of her workup and treatment, the initial abdominal CT demonstrated the presence of the gastric contents into the hernia sac leading to the gastric obstruction. The patient responded well to the conservative management using nasogastric (NG) suction, intravenous (IV) line maintenance, clinical assessment, frequent vital sign monitoring, and initiating the nothing per oral (NPO) regimen. Following the successful conservative approach, the patient opted to undergo surgical treatment in the future. This case report and associated literature search represent a rare case of a parastomal hernia with protruding gastric contents, which was successfully treated with conservative management.