Urinary Tract Infection, MedlinePlus, National Library of Medicine, National Institutes of Health, U.S. Department of Health & Human Services. This is the place to start for an overview and links to further information on urinary tract infection (UTI), and its symptoms/ diagnosis, treatments, prevention, causes, and additional information. UTI is a common problem for women, especially the elderly. Its symptoms, which include irritable behavior, are frequently not understood or mistaken for other problems. Diagnosis and treatment of a UTI can immediately improve behavior, and make life tolerable again both for your elderly loved one and for yourself as a caregiver.