4. Acid reflux
When we eat, food passes through the esophagus and reaches the stomach where it is digested. Between these two organs, there is a valve that opens to let the food get to the stomach and closes when digestion begins. Inside the stomach, there is hydrochloric acid, a very corrosive substance responsible for breaking down food so they can continue their journey to the small intestine. This acid doesn’t damage the stomach because this organ is coated with mucosa that protects it. However, the esophagus does not have this protection. When the valve that separates them does not close properly, acid reflux occurs, and it is reported as a burning sensation that, although it originates in the esophagus, can reach the chest or throat. With stomach ulcers, this sensation can be constant. Besides, the intake of acidic foods will significantly enhance the burning you feel.