If I ever have to take an antibiotic, I have to request an antifungal (sounds so nasty - like I have a fungus growing out of my hoohoo
) or it will develope into a yeast infection. Thank goodness it's a very cheap prescription. But, like other said, it could be be allergic reactions to soap or detergent, tight pants, heat rash, any number of things. Good luck! If we were guys, we could scratch those itches anytime and nobody would think anything of it.