A couple of hours after lying down, I start needing to urinate almost every hour. Each urination episode is accompanied by a release of lot of odorless gas but only 6 - 8 oz of urine. The tip of the tailbone area has a dull pain throughout this time. This hourly discomfort lasts for almost five - six hours after which there is very small amount of gas accompanying urination. The gas expulsion is not from the urinary or vaginal openings, it is being expelled from the anal area. I am regular in my BMs, not constipated. I don t drink caffeinated drinks, sodas, alcohol. I consume very little sugar but am on Armour Thyroid and on low dose of Lozartan (not hctz). Can you please help me determine cause of this gas pressure?