Bare!

Soo ive noticed that i get veeery itchy down there and i get like some kind of infection??? But only when i wear underwear even tho its made of cotton and clean!! I stop wearing them and the itchiness is gone i tought it was the laundry soap cuz i changed it recently but if it was that why my jeans pajamas shorts or even t shirts and sweaters doesnt make me itch? This is weird... i guess my ho ha likes to be bare lol i never wear thongs or other materials besides cotton in underwear this is just weird any of you have this problem besides me? Or is it my weird vagina that just likes to be bare??