why do the aged get severe urination some times during night?

my father is aged and some times he suffers from excess urination during night. that may be 10- 15 times. he is suffering from hyper tension. he keeps good health by doing yoga and believes in ayurvedic medicines.please help my dad to get well soon.

[FurballsMom]

I'm not sure why our dear seniors get this problem, but has your father been keeping up with his prostrate exams?  I hope he has been, since this is a common factor in why aged men have urinary problems.