Potty training readiness: the signs that actually matter

Potty training is one of the few parenting milestones where waiting is almost always faster than starting. A child who is ready learns in days. A child who is not can take months, and the difference is rarely effort.

Why age is the weakest signal

The physical part — recognising a full bladder and controlling the muscle that holds it — is a maturation process, not a skill you can teach. Until the nerves and muscles are ready, practice does not help, in the same way that practising walking does not help a four-month-old.

This is why comparing with other children is so unhelpful here. A cousin trained at 20 months and yours is 30 months and uninterested: that is a difference in maturation, not in parenting and not in intelligence.

The three kinds of readiness

You need all three at once. Two out of three is the recipe for a long, frustrating month.

Physical readiness in more detail

• Dry for about two hours. This is the key one — it means the bladder is holding rather than continuously leaking.
• Waking dry from a nap. Same signal, easier to spot.
• Predictable bowel movements. Roughly the same time each day makes the poo side much easier.
• Can get there. Walking steadily, sitting down and standing up unaided, managing elasticated trousers.

The cognitive and behavioural side

“Go and get your shoes and bring them here” is the level of instruction you need them to follow. Telling you during a wee comes before telling you before, and both are progress — the first is awareness, the second is anticipation.

Behavioural readiness is the one parents most often want to skip. A child who is not interested will resist, and a resisted potty is a much harder problem than a delayed one.

Signs your child is not ready yet

• Nappy is always wet — no dry stretches
• No awareness before, during or after
• Refuses to sit on the potty at all
• In the middle of a big change — new sibling, house move, starting nursery
• Currently very into saying no to everything

The last two matter more than they sound. Potty training during another upheaval is the single most common reason a first attempt fails.

How to start once the signs are there

• Pick a clear week. No travel, no visitors, no first day at nursery.
• Let them choose the potty and the pants. Ownership does a lot of work at this age.
• Go straight to pants at home. Pull-ups feel like nappies and slow the feedback that makes it click.
• Offer at natural moments — on waking, after meals, before going out — rather than asking “do you need a wee?” every ten minutes, which invites a no.
• Praise the sitting, not just the result. Early on, cooperating is the achievement.
• Keep the same words across everyone who looks after your child.

Accidents are part of it, not a failure

Expect them for weeks, and expect a cluster whenever something changes — a holiday, an illness, a new sibling, starting nursery. Regression after a genuine change is normal and usually short.

The response that works is flat and unbothered: clean up together, no fuss either way, move on. Frustration turns accidents into anxiety, and an anxious child holds on, which produces constipation, which produces more accidents. That loop is the main thing worth avoiding.

Night dryness is a separate thing entirely

Daytime training and night dryness are unrelated processes. Night dryness depends on the bladder growing and on a hormone that reduces urine production overnight — neither of which responds to training.

Many children are dry at night somewhere between three and five, and bedwetting up to age five is common enough that it is not treated as a problem. Lifting a child to the toilet at night does not speed the process up.

When it stalls

If a week in there is no progress at all, stop. Put nappies back on without making it a defeat, and try again in a few weeks. Almost every parent who has done this reports the second attempt going dramatically faster.

Two specific patterns are worth naming:

• Wees fine, poos in a nappy. Very common. Often about the sensation being unfamiliar, or about constipation making it hurt. Allow the nappy for poos while keeping pants for wees rather than forcing the issue.
• Holding on. A child who resists going and then has accidents may be constipated. This is worth raising with your health visitor or GP, because it rarely resolves by itself.

When to ask

Speak to your health visitor, GP or paediatrician if your child is over three and shows no readiness signs at all, if there is pain or blood when weeing or pooing, if constipation is persistent, if a previously trained child regresses for more than a few weeks, or if daytime wetting continues well past five. These are common and treatable, and getting help early is far easier than waiting.