When the bladder is full, urine is passed out
of the body through a narrow tube called the urethra. Cystitis is a painful condition that is common in women – it’s been estimated that more than half the women will get cystitis at some time. It can also affect men and children
, but this is less common. Although it is painful, if treated, it usually lasts no longer than a day or two, and does not usually cause any long-term problems. But if you get repeated bouts, you should see a doctor.