I am 50 old and have always been plagued with urinary tract infections since my early twenties which meant constantly taking antibiotics . I was referred by my GP to attend a urlologist and did so for until about two years ago. I had all the necessary recommended tests and everything was fine. The doctor there recomended that my husband had a vasectomy as the infections usually ocurred after sex. That worked for a while but they to come back again and he recommeded taking one antibiotic immediately after sex. Now for the past three months each time I have a period I get quite severe kidney infections and again need to go on a course of antibiotics. Why when I don t have sex during this time do these infection keep reoccuring. My sister died two years ago from cancer which started in her kidneys. I am really fed up and quite concerned.