My potty-trained toddler is suddenly having accidents again — what's happening?

Potty training regression is extremely common and usually temporary. Common triggers include: a new sibling, starting daycare, moving house, family stress, illness, constipation, or a urinary tract infection. The key rule is DO NOT punish or shame — this always makes regression worse. Go back to basics calmly: offer regular potty reminders, use pull-ups without calling them 'diapers' ('Just while your body is figuring things out'), and praise successful trips. Make sure they are not constipated, as hard stools make children avoid the toilet. If regression follows a new stressor, address the underlying anxiety. Most regressions resolve within a few weeks. Consult your pediatrician if regression lasts more than a month, if there is pain with urination, or if you notice blood in the urine or stool.