A hard stomach when pressed can occur for different reasons, often related to digestive issues like bloating, constipation, or trapped gas. Common causes include overeating, eating too quickly, swallowing air, or food intolerance, which can cause gas buildup and make the stomach feel tight and firm. Constipation can also lead to a hard, uncomfortable abdomen due to stool buildup. Other digestive conditions such as irritable bowel syndrome (IBS), gastritis, diverticulitis, or inflammatory bowel disease can create abdominal stiffness and pain. Stress and muscle tension may also cause the abdominal muscles to feel hard or tight. More serious causes include abdominal infections, inflammation (peritonitis), or gastrointestinal perforation, which require urgent medical attention especially if the hardness is accompanied by severe pain, vomiting, bloody stools, fever, or unexplained weight loss. Treatment depends on the cause but often includes dietary adjustments (avoiding gas-producing foods, increasing fiber and fluids), lifestyle changes like regular exercise and stress management, and medications as needed. If the hard stomach persists for several days or is accompanied by severe symptoms, it is important to seek medical evaluation promptly.