Why don't younger patients with urinary tract infections suffer from the symptoms of dementia when they have a UTI, but the elderly experience this symptom. Please note, I use "dementia" loosely. I do realize the difference between actually having the psychological disease and merely a symptom from an UTI. I am only using the term to best describe the situation I'm referring. in other words, why do the elderly get "crazy in the head" when they have a UTI, but younger patients do not?