N30: Cystitis

N30.3: Trigonitis

The bladder sits low down in the abdomen and collects the urine. The urine is produced in the two kidneys. The urine flows from the kidneys into the bladder via the ureters. When you pass water, the urine flows from the bladder via the urethra and out. The inside of the bladder is lined with a protective mucosal layer.

A section at the bottom of your bladder is inflamed. The mucosal layer there has been irritated over a considerable period of time and may be reddened as a result.

The condition doesn’t have to cause any symptoms. However, people with an inflamed bladder can experience pain when urinating and pain in the lower abdomen.