I Have Bladder Infection Every Two Months. It Cures Up

I have bladder infection every two months. It cures up and stats right back agai.What can I do .This has been most of my life.I am 82yrs. old....I was told by one Dr. that I had interestial Cyctius(not spelled correctly)...Then another Dr. told me I was to old to have that////// What does that mean? I'm in terrible pain most all the time and running to the bathroom.....