To the Editor: Catto-Smith gives a very good account of the medical management of constipation and soiling in children,1 but fails to mention psychological, interpersonal and social factors in the main part of his article. He does mention “behavioural abnormalities” towards the end, in the section “When to refer”.

I think it is generally accepted among paediatricians and child psychiatrists that the problem of constipation and soiling, or encopresis, often has multiple determinants and varied psychological effects on the child and the family. Certainly, the older the child is, the more likely these effects will be present.2

If this condition is to be managed in general practice over a period of “6–12 months”, general practitioners need to be aware of these factors so they can be addressed.

Twelve months is a long time in the life of a 5 year old, and in that time pathological patterns can become well established and hard to shift. Most children over 5 years with soiling have developed secondary psychological problems as a result of the soiling.3 At this stage, assessment by a child psychiatrist will often reveal that the child has developed a pathological fantasy world around what they believe is happening inside them.

The physical management of constipation and soiling is an essential part of the management no matter what the aetiology, but addressing the psychological interpersonal and social factors is equally important. If these factors are obvious to the GP and are not responding to intervention, the family should be referred to a child psychiatrist. With children over 5 years, the secondary effects have almost always become significant, and I believe that all these families should be referred for assessment.

Catto-Smith quotes a 30%–50% relapse rate,1 and “there is evidence that they do not improve on reaching puberty”. This is not my experience with families that have the benefit of a multidisciplinary approach to the disorder.

In reply: Hocking emphasises secondary behavioural and emotional effects that occur in some children with longstanding faecal soiling. Fortunately, there is good evidence that these tend to resolve with effective multimodal treatment of the constipation.1 The relatively high long-term relapse rate of soiling among children who have been treated in tertiary centres has only recently been recognised,2 but the psychological features of this relapsing group are not well defined. My review was directed toward general practitioners and was as much as possible evidence-based.

I am unaware of any good quality evidence to support Hocking’s assertion of the benefits of automatic referral to a child psychiatrist of all children over the age of 5 years with ongoing faecal soiling. Given the beliefs of both myself and Hocking, that constipation and soiling are likely to have multiple determinants and varying psychological effects, it would seem to be appropriate to triage “problem” patients through a general paediatrician, with referral for psychological assistance if deemed appropriate. This is best summed up in my article in the section that Hocking mentions, “When to refer”.3