An infection of the urinary tract more than two times within a six-month period. Also called chronic bladder infections. Not caused by a autoimmune disorder or caused as a symptom of another diagnosis, i.e. stones, bathing in lotion, other intimate fetish resulting in UTI.
https://www.mayoclinic.org/diseases-conditions/cystitis/expert-answers/bladder-infection/faq-20057833