Hello,
Thank you for posting your query at DoctorSpring.com
Diet is more important in management of Fissure in ano.
You should take plenty of liquids, high fiber diet, fresh fruits and vegetables.
Your stool should be soft.
The best local Ointment in my experience is Diltiazem for Anal application twice daily.
Water that you drink will take time to come out from urethra. It can't be 5 to 15mts. But,you have to drink 4-5 litres of water daily.
Laxative containing polyethylene glycol has to be taken at bedtime as stool softener.
Nothing to worry.
It will be relieved.
Hope I answered your query,
If you have any questions, I will clarify further.
Wish you good health.
Regards