My 10 year old daughter has bouts of severe pain that radiates from her bottom to her vagina. This has been ongoing for some time and everytime I take her to the doctors everything presents as normal. Pain has been been so severe on times I've had to take her to A & E. We have been advised not to use any soap and she only wears cotton underwear. Does anyone else have any experience of this? Pain is usually at night and can last for anything up to two weeks.