Chronic constipation (most common, most often missed). A child who has had painful bowel movements — even once or twice — can develop a fear of releasing stool that persists for years. The child may pee on the toilet fine but refuse poop entirely, or withhold so much they become impacted. Signs: going 3+ days between bowel movements, hard stools, straining, stomach pain, soiling underwear between movements (overflow). This requires medical treatment, not behavioral strategies.
Entrenched power struggle. After 2+ years, potty training may have become a primary site of conflict between parent and child. The behavior is now about control, not about the toilet. In this case, continued pressure makes it worse. A full reset — backing off completely, treating the child as capable, and restarting fresh in 6–8 weeks with zero emotional charge — often unlocks progress.
Undiagnosed developmental differences. Children with autism, ADHD, or sensory processing disorder often have genuinely different sensory experiences around toileting — they may not feel the urge clearly, may be overwhelmed by bathroom sensory input (sounds, lighting, the sensation of the seat), or may struggle with the multi-step sequence. Standard methods don't work for these children without modification. A pediatric occupational therapist can be transformative here.
Toilet anxiety. Fear of falling in, fear of the flush, fear of the bathroom itself — these are real and can be paralyzing for some children. Forced exposure makes it worse. Gradual desensitization with full child control is needed.
For children who respond to structured external cues: Some children who resist parental prompting respond completely differently to an impersonal timer. The Benny Bradley's Potty Training Watch removes the parent from the equation — "my watch says it's time" is a fundamentally different dynamic than "mom says it's time." Worth trying after a reset, especially for children with control issues. Available for girls and boys.