You should talk with a urologist. I was told if I had more than three per year it was time to see one. I have a wonderful urologist who really cares and has been in the practice for two years. I'm suprised he is really good. The office told me he was when I went to make an appointment with another dr. but since that dr. had a two month waiting list, they offered me to see the new dr. I'm so glad I did!
I was diagnosed with urethral stenosis a couple years ago and got dilated by my urologist. Recently I saw my urologist again for more emptying problems and after having a UTI. He asked me if he could dilate me and I agreed saying ok because I hadn't had any UTI's for awhile since my first dilation. When I had more problems of infections I called to see what a correct dose of prophlactic antibiotics were and how I should take them.
He put me on a six month prophylactic dose of antibiotic (amoxicillin 250 mg) for after intercourse and told me if I had any more UTI's while on the antibiotic or after I stopped the antibiotic I was to go back to see him for another evaulation. The dose for prophylactic verse infection are different and what to do when you get symptoms of a UTI vary from dr. to dr. Go see a urologist.
To help prevent UTI's, I was told to also empty my bladder after sex and drink lots of water. I take a shower both before and after and sometimes I still manage to get UTI's anyway. I hope this six month course will help me. I had a cystoscopy with dilation for stenosis (narrowing of the urethra). The dilation was quick and painless as I got some lidocaine jelly on the inside. I thought the UTI's were related to it. I know if the bladder is not emptying completely it can put us at risk for more infections. Stenosis can cause incomplete bladder emptying.
I am interested in this D-Mannose that RageOfAngels mentioned. You should get an evaluation by a urologist before taking anything on a regular basis. Ask your primary dr. for a recommendation or other friends. Here is a website you can look up a dr. to check his/her license to see where they went to school and if they have anything negative on their license. http://www.mhsource.com/resource/board.html