Personally, even though I am here posting on a forum called "IBS," I hate the term "IBS." I was told for years that I had "IBS," even though what I really had was "IBD," Inflammatory Bowel Disease. IBD is a disease process due to chronic inflammation, which can raise your risk of developing colon cancer, it can cause problems with nutritional uptake, it can cause systemic issues like joint pain, inflammation in the eyes, skin, etc.
IBS causes none of these things. People on this forum are sometimes suffering from undiagnosed disease, and I try to help those I can find the right path to diagnosis. Other people on this forum are really suffering from something doctors have taken to calling IBS because they don't know what else to say. There doesn't seem to be a way to help these people, although there's been some progress with understanding dietary intolerances.
Your daughter would probably benefit from some analysis of her diet. Most teens don't know how to eat right and don't seem to care. If your daughter is interested in being less gassy and having more frequent bms, she could visit with a dietician and learn more about
eating right. who knows, your whole family might benefit from this. Most people on this forum and the IBD forums here at Healingwell have learned how to avoid the processed food aisles at the grocery store and how to cook healthy meals at home.
Most women notice changes in their bowel habits linked to their menstrual cycle. This isn't "IBS," it's normal female biology. Sometimes these changes are annoying, like having diarrhea right before your period starts, or getting constipated in the 2nd half of your cycle. You can manage a lot of this by changing what you eat during those times of the month, but overall you just have to learn to roll with the punches so to speak. Bloody stool is not normal and is not to be "lived with," although look at me, I'm not rushing my daughter in for a scope. Ugh. Responding to your posts makes me realize I really do need to do this.