Sounds like you have Candida Albicans. I think it is chronic to CFers because, and only because of all the antibiotics. When the Candida gets out of hand, all sorts of things can happen. Ultimately it too can tax you immune system. The only thing I recommend is supplements. I would discourage anyone from taking prescription anti-fungals like flucanozol or difulcan. They just put you at risk for kidney and liver failure and compound the problem, which is your body is a natural biosphere of organisms, and when you kill too many of one organism in this environment, other not so good organisms can thrive. If the wrong ones thrive, or any thrives too long in this state of imbalance these sort of problems manifest. There is this website called modernherbalist.com which has a ton of supplements (natural anti-fungals) targeting Candida, and Candida related problems (athletes' foot, jock itch, ringworm, hives, yeast infection, thrush, and a few more). I had Candida really bad twice, and I had ringworm bad and chronic hives, each for over 5 months. If you aren't into taking too many supplements, or can't afford all the options, acidophilus is a good and simple choice. I use the hardiest strain around called Lactobacillus Sporogenes. Good luck.