Anorectal anomaly | Dietary fluid balance | Diet and perianal discomfort | Learned avoidance | Intermittent full megarectum | Permanently full megarectum | |
| | | | | Denial | ?? Acceptance of responsibility |
Anterior ectopic anus | Inadequate intake | Food fads | Faecal retention | Faecal retention | Faecal retention | Faecal retention |
Anal stenosis | Poor feeding | Poor feeding | Poor compliance | Poor compliance | Poor compliance | Poor compliance |
Hirschsprung | Food intolerance | Food intolerance | Behaviour problems | Behaviour problems | Behaviour problems | Behaviour problems |
| Anal fissure | Anal fissure | Neuropathic if urinary incontinence | School problem | School problem | School problem |
| | Perianal streptococcus infection | | Bullying | Bullying |
| | Rectal prolapse | | | |