I have only heard of this when it is a bladder infection. I love sweets, and have never had this happen, but have had bladder infection, and the burning then.
Why didn't I think of that - flavouring? Chocolate? Thank you. I just may prepare for the next time. And, of course, you are right about seeing the doctor if it persists. Baking soda is only recommended for a light and easily-cleared case.