JessM I totally agree with you about cranberry juice and fluids. I have suffered from intermittent bouts of cystitis ever since adolescence and have looked at all the available evidence, hoping for a cure. Renal investigations were normal, and I have tried everything to prevent attacks. Only advice I've had which works is to always drink lots of fluid, try to ensure bladder empties properly when urinating (as someone has mentioned) especially after sex, and take one prescribed antibiotic after sex. This has made the condition manageable for many years, but sadly now I am older and more prone to UTIs as all the vital bits have started drying up, I have to be more careful. It's the wicked menopause fairy I blame. I wish women were less coy about discussing these problems - I don't mean Gransnetters!