Supplementary detail

I forgot to mention I am a very clean person, I wash regularly the genital and anal area, I wear natural-fiber (cotton) underwear.
And I also forgot to mention that the perigenital and groin itch I developed about a month ago ocurred after I used public toilets two or three times (which I usually try to avoid...).
I mean, I was careful not to get in contact with the toilet etc., but you know it's pretty difficult to avoid any contact with the toilet when you use a public WC. I just thought this piece of information might be useful to you too.
Thank you for your time and I hope you can help me!