The WTM discussion forum is here. Cystitis by definition is an infection of the bladder.
Bacteria are the cause, most commonly from a woman's own body.
Hence, the typical symptoms of pain on passing water and lower abdominal tenderness. Generally, cystitis is successfully treated with a course of antibiotics, but there are ways and means of reducing your risk of infection in the first place. If you are prone to cystitis, empty your bladder fully before bedtime and immediately after intercourse. Alternatively, take cranberry extracts in a capsule form. Dandelion supplement acts as a powerful diuretic, ensuring that infecting bacteria are passed out of the body before they can cause an inflammatory reaction.