hi i am ivan karlo from the philippines, male, 17 years old, i have been experiencing severe pain in my stomach for a couple of months. i was diagnosed by my pediatrician with hyperacidity or i think gastritis, i just cant remmber. now i am having a research paper about my condition, would you please tell me something about hyperacidity or gastritis. nature? causes? prevetive measures? how should i eat? will i be free from it? thank you.