Both are elimination disorders involving involuntary or intentional passage of bodily waste into inappropriate places past the expected age of continence, differing in the substance involved (urine vs. feces) and the typical underlying mechanism.
Enuresis requires a chronological or developmental age of at least 5 years; Encopresis requires at least 4 years -- reflecting the different typical ages at which bladder versus bowel continence is established.
Enuresis requires at least twice weekly for 3 months (or clinically significant distress/impairment); Encopresis requires at least monthly for 3 months.
Enuresis, especially nocturnal-only, often has a strong genetic/familial component; Encopresis is most often driven by an underlying constipation-and-overflow mechanism following painful or withheld bowel movements.
Both can cause significant embarrassment and social restriction; Encopresis in particular is often complicated by family frustration or punishment before the constipation-driven mechanism is recognized.
Both require ruling out that the behavior is attributable to a substance or a general medical condition -- for Encopresis, except through a mechanism involving constipation, which remains consistent with the diagnosis.
The substance involved (urine vs. feces) and the different age thresholds (5 vs. 4 years) are the clearest differentiators; both can co-occur in the same child given their shared developmental and sometimes psychological underpinnings.
Both are sometimes attributed to willful defiance or laziness by frustrated caregivers, when most presentations -- particularly nocturnal enuresis and constipation-driven encopresis -- are involuntary and physiologically or genetically rooted rather than behavioral choices.
A 7-year-old who wets the bed most nights with a family history of bedwetting and a normal medical workup has Enuresis; an 8-year-old who soils underwear and is found to have significant stool impaction and a history of painful bowel movements has Encopresis.
| Feature | Enuresis | Encopresis |
|---|---|---|
| Substance involved | Enuresis: urine | Encopresis: feces |
| Minimum age threshold | Enuresis: 5 years (chronological or developmental) | Encopresis: 4 years (chronological or developmental) |
| Typical underlying mechanism | Enuresis: often genetic/familial, especially nocturnal-only | Encopresis: most often constipation and overflow incontinence |
Repeated voiding of urine into bed or clothes, whether involuntary or intentional, occurring at least twice weekly for at least 3 months (or causing clinically significant distress/impairment), in a child with a chronological or developmental age of at least 5 years, not attributable to a substance or a general medical condition.
Repeated passage of feces into inappropriate places (e.g., clothing, floor), whether involuntary or intentional, occurring at least once monthly for at least 3 months, in a child with a chronological or developmental age of at least 4 years, not attributable solely to a substance or a general medical condition other than through a mechanism involving constipation.