My stomach blots a lot. what could be the reasons?

You mean "bloating?": The GI tract has a very limited # of symptoms to signal its distress--nausea/vomiting, diarrhea/constipation, bloating, pain, fullness, bleeding, etc. As you know, many of these characterize ibs, but are also seen with inflammatory, infectious, ischemic, malabsorptive, and functional disorders. Directed lab work, imaging, biopsies, stool studies are appropriate in excluding non-ibs pathology.

Bloating: You could have a food sensitivity, an intolerance to a food, an overgrowth of yeast, leaky gut, or an imbalance in the types of bacteria like SIBO.