Hi, Thank you for posting at Health Care Magic.
The problem you have is related to gastritis(red mucous). It is an inflammation, that produces Hydrochloric acid(muriatic acid) more than needed. This is the reason why you feel uncomfortable. I recommend not to drink or eat: coffee, milk and high acidic foods. You should eat many times a day. Also you should take anti-acid. I recommend omeprazole
*Also contact your medic for medicines.