Kidney infection and UTI are 2 different beasts. UTI can be cured with didn't tons of cranberry juice, but make sure its 100% juice, not cranberry cocktail. I have had a bunch of UTIs. Only once have I had a kidney infection. I was 20 wks Preg, running a fever, and had such a bad headache, I felt like there was a knife in my head. Tylenol would not even touch the pain. I ended up in the ER. On IV for fluids and abx, getting all kinda tests, and ended up needing percocet for my head!