I have on and off stomach issues. if it was ulcerative colitis or crohn's, would it come and go? or does it only go away if you receive treatment?

IBD: Inflammatory bowel diseases (Crohn's and UC) typically do not have symptoms that "come and go", however, they can. Warning signs for these 2 disease are persistent diarrhea, weight loss, severe abdominal pain, bloody or mucous stools, vomiting, joint pain, and rashes. If your symptoms are severe OR have lasted longer than 2 months you should see a gastroenterologist.