Hi Welcome to the HCM I have gone through the question and understand your concern. If the symptoms occur only before school timing and improve at other times, it s more likely due to anxiety he is facing for school. Counselling will be useful in that case. In case the symptoms are persistent at other times of day as well, then we need to think in organic cause of illness such as vitamin deficiencies, gastritis or worm infestations. You may deworm him by Albendazole or nitazoxanide in that case and start him on Lansoprazole before breakfast for a few days in such case. Also, assure a healthy balanced diet with lots of fluids. Hopefully this will help. Take care