Posted 3/11/2019 3:18 PM (GMT -6)
1. Any IBD or other so-called 'autoimmune' diseases in the immediate or extended family (siblings, parents, cousins, aunt, uncles, grandparents)?
2. Is he on any medications or supplements, either prescription or over-the-counter? NSAIDs like ibuprofen, as mentioned, can cause problems in the GI tract. Other meds can too, such as PPIs sometimes leading to high fecal calprotectin.
3. Is he growing as he should for his age? Is his pedatrician tracking his growth? Stunted growth can be a sign of IBD.
This doesn't sound like UC to me - UC almost always involves some combination of diarrhea and/or bleeding.
But it could be many other things, with Crohn's being one of them.