Over a 3 yr period we performed colostomies in 13 paediatric perineal burn patients out of a total of 1544 patients admitted to our Burns Unit during that period. The mean total body surface area (TBSA) burn was 34% (14–65%); ten patients sustained fire burns and the remaining three hot water burns. We performed prophylactic colostomies in seven children, therapeutic colostomies (to counteract deep wound infection and septicaemia with gut-derived organisms) in five patients and one colostomy in a cerebral palsy child with a left hemiparesis. A sigmoid end-colostomy with Hartmann's closure of the distal segment was the preferred method of choice. In all children but one (died from multi-organ failure 13 days after admission) there was a marked improvement in the clinical appearance of the burn wounds and subsequent graft-take and healing. There was a change in the bacterial profile away from predominantly gut-derived Gram negative organisms to either Pseudomonas aeruginosa or no pathological organisms grown. Complications were few — two children suffered prolapse of their colostomy requiring manual reduction. We advocate diverting colostomies in a highly select group of paediatric burn patients in whom continual faecal soiling is threatening to both graft and life.