Depending on what's causing your child's regression, you may need to go back to square one and "restart" potty training. First, consider whether your child was and still is definitely ready to ...

I am struggling with potty training my daughter ... gets upset if I push her – so now it feels like we are going backwards. Her older brother was trained before his third birthday.

In this case, it's usually best to back off on constant reminders or questions about going to the potty, tell your child that they're a big girl or big boy and you're going to let them take charge ...

And put the potty out in the yard with them or in the play room and let them go themselves. Now if they aren't ready, they'll go on the floor. Be careful. But at the point where they will go by ...