At the Cat Clinic of Kokomo (a division of the Jefferson Road Animal Hospital) we see several cases of urinary disease in cats every week. It is one of the most common problems we see. This link contains 2 very informative videos that explain the causes and the link with stress in cats. Excuse the presenters British accent, she may use some terms differently than we do. Still a very good presentation.
There can be many causes of urinary tract disease in cats. Stress often plays a role. Many cat owners have difficulty accepting that their cat is stressed.