A chronic cystitis characterized by unpleasant sensation related to the bladder and lower urinary tract in the absence of identifiable causes and has_symptom pain, has_symptom pressure, has_symptom discomfort, has_symptom dysuria, and/or has_symptom urinary frequency. [ url:https://www.mayoclinic.org/diseases-conditions/interstitial-cystitis/symptoms-causes/syc-20354357 url:https://en.wikipedia.org/wiki/Interstitial_cystitis http://purl.obolibrary.org/obo/ECO_0007637 http://purl.obolibrary.org/obo/ECO_0007638 ]