Your symptoms of stomach ache and back pain after a heavy meal like paratha could be due to indigestion, acidity, or gas. For temporary relief, you can try an over-the-counter antacid containing calcium carbonate or magnesium hydroxide, or an acid reducer like famotidine. If the pain is due to stomach cramps, a mild antispasmodic like dicyclomine may help. Rest in an upright position and sip warm water. While these symptoms are usually harmless, pain radiating to the back after fatty food can sometimes point to gallbladder issues. If the pain is severe, persistent, or accompanied by vomiting or fever, please consult a doctor for a proper evaluation.