Stomach problems refer to a range of digestive issues affecting the stomach and intestines. These may include indigestion, acid reflux, gastritis, bloating, constipation, diarrhea, ulcers, and irritable bowel syndrome (IBS). Such conditions can arise from poor dietary habits, infections, stress, or underlying medical conditions. Other contributing factors include food intolerances (such as lactose or gluten intolerance), bacterial or viral infections, overuse of medications like NSAIDs, and chronic conditions like inflammatory bowel disease (IBD) and gastroesophageal reflux disease (GERD).