Burning sensation in my stomach!?

Burning stomach: This is usually due to excess acid build up. Most likely to occur when your stomach is empty (because food buffers acid). In the case of acid reflux, the discomfort may be the worst around 1/2 - 1 hour after a meal or while lying down. Peptic ulcer is another cause, usually with gnawing central abdominal pain when the stomach is empty, particularly at night, and it feels better after eating.