Ulcers Belly pain and ulcers could be the result of a less-than-healthy gut microbiome. When too much bad bacteria have free rein in your belly, it can cause inflammation, a disruption of your belly’s natural pH balance, and erosion of your stomach lining. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
