Symptoms of ketamine-induced uropathy in children include frequent urination, loss of bladder control, blood in the urine, and severe pain described by some patients as feeling like "weeing over broken glass."

From the article'Peeing a jellyfish': Children's ketamine injuries revealedAlso in Children as young as 13 suffering bladder damage caused by ketamine, Children as young as 13 losing bladder control after getting hooked on ketamine, Teens as young as 13 referred for ketamine-linked bladder problems at UK clinic, Children as young as 13 being referred to UK hospital suffering from ‘ketamine bladder’