After a viral fever, intermittent stomach pain is often due to temporary gut irritation or post-viral Gastritis or spasms. Medicines like Lanzol Junior and Ondem can help reduce acidity and nausea, while Drotin DS may relieve cramps, but avoid overuse. Give light, bland food, plenty of fluids, and probiotics for recovery. If pain persists beyond a few days, worsens, or is associated with vomiting, fever, or poor appetite, consult a doctor for evaluation.