The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are
Doctors diagnose bladder diseases using different tests. These include urine tests, x-rays, and an examination of the bladder wall with a scope called a cystoscope. Treatment depends on the cause of the problem. It may include medicines and, in severe cases, surgery.
NIH: National Institute of Diabetes and Digestive and Kidney Diseases