Dr. My teen daughter has a sore in her vagina. I took her to her pediatrician and she is testing for HSV I am 100 percent sure that my daughter is not sexualy active . She is celiac and I read that celiac can be prone to NSGU. She had a flu before this and then the pain in her vagina started. The sore is small round with a red circle with a white tint of yellow on it. She is in a lot of pain.