For a few months I ve had an off and on problem where it burns when I urinate. I started drinking a lot of water, and eventually the problem would go away. At times it would smell bad as well. It doesn t burn anymore when I drink a lot of water and then urinate, but naturally after drinking a lot I use the restroom a lot with no discomfort. But I have to go a lot after I do. However, I do have burning when I don t drink water and when I begin to hold my urine it burns. Even afterward, it continues to burn for a while. What do I have?