Stomach problems refer to a variety of conditions that affect the stomach and upper digestive tract, causing discomfort or impaired digestive function. Common issues include gastritis (inflammation of the stomach lining), ulcers, indigestion, acid reflux, food intolerances, infections, or functional disorders such as dyspepsia. Symptoms may include abdominal pain or burning, bloating, nausea, vomiting, heartburn, loss of appetite, or changes in bowel habits. Causes can range from infections, dietary factors, stress, medications, or underlying medical conditions. While many stomach problems are temporary and mild, persistent, severe, or worsening symptoms should be evaluated to identify the underlying cause and prevent complications.