Potty training that’s going smoothly needs no article. This is for when it has stopped going smoothly, which happens to most families at some point, and almost always has a specific, fixable cause.
Check for constipation first
Constipation is the single most common hidden cause of potty training problems, and it produces symptoms that look nothing like constipation.
One hard, painful stool teaches a child that pooing hurts. They hold it in. Holding makes the next one harder and more painful, which confirms the lesson. Within a fortnight you have a child who refuses the potty, has wee accidents, and appears to be being difficult.
The wee accidents are the surprising part: a full bowel presses on the bladder, reducing how much it holds and how much warning the child gets. Treating the constipation frequently resolves the wetting without anything else changing.
Signs to look for: fewer than three bowel movements a week, large or hard stools, straining or crying, blood on the paper, standing on tiptoes or crossing legs to hold on, a tummy that feels firm, or small smears in the underwear, which is often overflow around a blockage and gets mistaken for laziness.
What to do: more water, more fruit and fibre, a footstool so the knees are above the hips, and sitting for a few minutes after meals when the bowel is naturally most active. If it’s entrenched, see your doctor or polyclinic. A stool softener is often needed, and diet alone won’t clear a backlog. Don’t add pressure to a child who’s withholding. It makes it worse in every direction.
Regression
A child who was reliably dry starts having accidents again. This is common and almost always has a trigger:
- A new sibling
- Starting or changing childcare
- Moving house
- Illness
- A change in who looks after them
- Tension at home
What works: go back a step without comment, reinstate the reminders and the regular sits, and give a lot of ordinary attention that isn’t about the toilet. Don’t shame, don’t punish, and don’t treat it as a return to nappies unless the child asks. Most regressions resolve in two to four weeks.
If there’s no trigger you can identify, look for a medical cause below.
Accidents at preschool but not at home
Very common, and usually one of these:
- They’re holding all day: often because they dislike the school toilet, or don’t want to interrupt play, or feel embarrassed asking. Holding all day is a direct route to constipation.
- They don’t know they’re allowed to go without asking, or are afraid of asking.
- They can’t manage the clothes. Buttons, belts and tight trousers defeat a three-year-old in a hurry. Dress them for speed on school days.
Ask the teacher directly what the toilet routine is, whether your child ever goes, and whether they can be reminded. Send spare clothes, and tell your child explicitly that accidents at school aren’t something they’ll be in trouble for.
Fear of the toilet
- The flush. Loud and sudden. Flush after they leave, or let them press it themselves so they control it.
- The big toilet. A gap they might fall into, and feet that don’t reach. A seat insert plus a firm step stool fixes both, and feet on something solid is necessary, because a child can’t push with dangling legs.
- Poo specifically. Some children experience it as losing part of themselves. Odd, common, and it passes.
- Public toilets: automatic flushes and hand dryers frighten a lot of children. A sticky note over the sensor is a widely used trick.
When it’s medical
See a doctor for any of these instead of persisting with technique:
- Pain or crying when weeing, strong-smelling or cloudy urine, fever, or tummy pain: possible urinary tract infection, which is a common cause of sudden regression and needs treating
- Sudden intense thirst with lots of wetting, weight loss, or unusual tiredness. This one is urgent: it can indicate diabetes, and it’s often first noticed as a potty training relapse
- Constant dribbling or underwear that’s never quite dry
- A weak or interrupted stream, or straining to wee
- Constipation that hasn’t shifted with diet changes
- No progress at all past about four, or complete refusal that has lasted months
Permission to stop
If potty training has become three weeks of daily conflict, stop. Put nappies back on, say nothing about it, and try again in four to six weeks.
Nothing is lost. A child who has come to associate the potty with being in trouble has a bigger problem to undo than one who started a month later, and children who restart after a break usually train fast.
This holds even against a preschool deadline. Pressure applied to meet a date is exactly what produces withholding, and withholding takes far longer to resolve than waiting would have.
Frequently asked questions
Why has my potty-trained child started having accidents again?
Usually a trigger: a new sibling, starting childcare, a house move, illness, or tension at home. Go back a step without comment, reinstate the regular toilet times, and give plenty of attention unrelated to the toilet. Most regressions resolve in two to four weeks. If there’s no identifiable trigger, see a doctor to rule out a urinary infection or constipation.
Can constipation cause wetting accidents?
Yes, and this is the most commonly missed cause. A full bowel presses on the bladder, reducing capacity and warning time. Treating the constipation often resolves the wetting on its own. Watch for hard or infrequent stools, straining, tiptoeing or leg-crossing to hold on, and small smears in the underwear, which are usually overflow around a blockage, not laziness.
My child holds it in and refuses to poo. What do I do?
Treat it as constipation, not behaviour. More water, more fruit and fibre, a footstool so the knees are above the hips, and a few minutes of sitting after meals. See your doctor if it’s entrenched, since a backlog usually needs a stool softener and diet alone won’t clear it. Adding pressure makes withholding worse.
Why does my child only have accidents at preschool?
Usually they’re holding all day, because they dislike the school toilet, don’t want to interrupt play, or feel awkward asking. Sometimes they simply can’t manage the clothes fast enough. Ask the teacher what the routine is, dress your child for speed, send spares, and tell them explicitly they won’t be in trouble.
When should potty training problems see a doctor?
Pain when weeing, cloudy or strong-smelling urine or fever; constant dribbling; a weak stream; constipation that won’t shift; or no progress at all past four. Sudden intense thirst with heavy wetting, weight loss or unusual tiredness is urgent: it can indicate diabetes and is often first noticed as a potty training relapse.
Is it okay to give up and try later?
Yes. If it has become weeks of daily conflict, put nappies back on without comment and try again in four to six weeks. Nothing is lost. A child who associates the potty with being in trouble is a harder problem than one who starts a month later, and children who restart after a break usually train quickly.
The main points
Check for constipation first. It causes refusal, wetting accidents and smears in the underwear, and it looks like defiance from the outside.
Regression almost always has a trigger. Go back a step quietly and it usually clears in a fortnight or so.
Sudden thirst plus heavy wetting is the one to act on today. And if it has become weeks of conflict, stop. That’s a strategy, not a defeat.
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This article is general information and not a substitute for medical advice. See your doctor or polyclinic about pain, blood, persistent constipation, or sudden thirst and wetting.