Usually, people's stomachs burn because of a bad diet, and even if your esophagus burns, you can already have a lot of misery because it flows back there. It was common for me too until I paid attention to the food. My stomach has been eaten mainly by a lot of sweets. The point is not to overdo sweets and sugary drinks, and you should eat a lot of vegetables. If you have no other illness, that will solve the thing.