There is a condition called Overactive Bladder or detrusor instability which wasn't mentioned above, see: http://www.amwa-doc.org/Education/overactive_bladder.htm ------------------Ph.D. in BiologyAuthorized Expert for IBS Self Help Group - Ask the Specialist forumquote:Common Causes * excessive fluid intake* urinary tract infection* prostatitis (infected or inflamed prostate gland)* pregnancy* radiation therapy* diabetesNote: There may be other causes of urinary frequency/urgency. This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on age and gender of the affected person, as well as on the specific characteristics of the symptom such as time course, aggravating factors, relieving factors, and associated complaints. Use the Symptom Analysis option to explore the possible explanations for urinary frequency/urgency, occurring alone or in combination with other problems.