Paralytic ileus is an obstruction of the intestine caused by paralysis of the intestinal muscle resulting from physiological, neurogenic, or chemical imbalances rather than mechanical causes. It is the second most common reason for hospital readmission within 30 days of surgery. Symptoms include abdominal cramping, nausea, vomiting, diarrhea, distention, and constipation. Diagnosis is typically made through x-ray, and management involves bowel rest with NG tube decompression if needed, IV fluid replacement, withholding opioids, and mobilization when possible.