With a cystoscopy, ideal with epidural anesthesia or general anesthesia, in order to distend the bladder, a thing which is not possible when the patient is awake; to distend the bladder lesions appear which cannot be seen with the naked eye, petechiae and ulcers of Hunner, these lesions confirm the diagnosis.
Although some urologists prefer to include the CI
under the name of painful bladder syndrome to include other symptoms that are within the box of painful bladder, but they are not as intense.
Also usually do a urodynamics to know the storage capacity of urine from the bladder and to evaluate the detrusor muscle and its degree of hyperactivity.