A high output stoma refers to an excessive volume of faecal output from either a newly formed stoma, or one that has been established for a long time. It is more common in those who live with an ileostomy and is a precurser to dehydration, renal failure and malnutrition. In severe cases, hospitalisation may be required to correct fluid and electrolyte losses. This episode explains what is high output, the causes, prevention and treatment for this condition, and how to manage high output through nutritional, medical and practical pouching strategies.