I didn't even know I had horseshoe kidney until I started getting urinary tract infections often. My doctor asked me a lot of questions about my lifestyle, and when she could find nothing in it that pointed toward a cause for my frequent infections, she ordered an ultrasound.
She found my oddly shaped kidney, and she let me know that I would have to take extra precautions to avoid getting infections. I was prone to them more than most people, so all I could do was change my diet a little.
She suggested taking cranberry supplements and drinking cranberry juice. This would keep bacteria from clinging to my urethra.
She also said that eating pineapple and yogurt would help. I have been taking, eating, and drinking everything she suggested, and I haven't had nearly as many infections this year as I had the previous year.