Hello, my 13 year old has had a recurring bout of oral thrush - although it possibly returned because we stopped the treatment the first time too soon. Her GP has now ordered a blood test and I am a freaking out a bit as I see oral thrush is rare without underlying conditions. She's not taken antibiotics recently or had any other medications, seems perfectly healthy and energetic, eats a reasonably balanced diet (although maybe not balanced enough for a vegetarian) but I'm really worried why its sprung up now. Has anyone had it for no particular reason? Is that possible? Thank you.