Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. In Pckd it is common for the cyst to get infected and cause pain which is seen in your case where it is rupturing into the collecting ystsema nd to the bladder. please meet your urologist and get urine routine, culture and ultrasound kidney ureter and bladder which can suggest what next to be done. Hope I have answered your query. Let me know if I can assist you further.