Understanding your child's body: The bladder and bowels are closely related. If your child is constipated their tummy may be so full of poo that it makes their bladder misbehave and potty training much more challenging.

Frequency: Your child should poo at least four times a week and the poo should be soft and easy to pass - a number 4 on the Bristol Stool Chart.

Keep a record: If they’re passing hard poos or going less often than this, they may be constipated.

Don't be fooled: Leaking, runny poo can also be a sign of constipation, as new poo squeezes around the hard old poo which is stuck in the rectum.