Hello, I?ve suffered from cystitis for years now, I?m always on antibiotics but they never work. So my doctor said I need to have a scan on my belly and an internal scan. The results have come back and it says I?m completely fine, that nothings wrong. So why once a month does it hurt really bad when I wee, it?s literally once a month I get it. But my doctors said nothings come back on the scan? Could it be cos I ain?t drinking enough water? My diet is quite bad could it be that? Because I?m starting to get fed up now it?s once a month and I can?t take the pain anymore.