Lemon juice helps digestion in the stomach, which ultimately helps the small intestine. If you're prone to burning that means you don't have enough of a protective mucous layer. The healthy mucus becomes compromised when we don't ahve enough friendly microbes, Vitamins A, E, C, zinc, B vitamins and essential fatty acids. For immediate relief do liquid aloe vera juice and marshmallow tea or tincture. Then see about taking EmergenC, cod liver oil, nutritional yeast and wheat germ oil for the rest.