Needing to pass stool soon after eating, especially with a normal appetite and no gas, is often due to an exaggerated gastrocolic reflex (a normal bowel response that becomes overactive) or a condition like Irritable bowel syndrome rather than an infection, which is why antibiotics like Norflox-TZ did not help. This is usually not serious but can be bothersome; it can improve with regular meal timing, stress management, avoiding trigger foods (spicy, oily, caffeine), and increasing soluble fibre (like oats, bananas) to regulate bowel movements. However, since symptoms are persistent, it is important to consult a doctor for evaluation (such as stool tests) to rule out other causes, especially if you notice weight loss, blood in stool, or worsening frequency.