Chronic usage affects the lining of the bladder, and can shrink it.
This can lead to frequency in needing to urinate, infections, bleeding, blockages and incontinence.
"I think we've seen a huge explosion of young people taking ketamine throughout the country, and that means that they come to see us with a significant urinary symptoms and these symptoms can include going to the toilet every hour or even every half an hour," he said.
