Heartburn has many causes. The parietal cells of the stomach produce excess acid in response to certain stimulants. The most common stimulants are caffeine, nicotine, greasy foods, fried food, a vast array of medications and our old friend anxiety. Once the acid is produced it spreads out to all areas of the stomach, lower intestine and the esophagus. Prolonged exposure to acid causes erosions in the areas involved called ulcers. Prior to the ulcer extreme inflammation occurs, representing itself as regurgitation, pain, nausea and vomiting. The best home cure is to stop the offending agent. Once stopped the cells takes weeks to recuperate. In the short term antacids are helpful. Milk products can counterbalance some of the acid's effects. Yoghurt has been known to help. There are dozens of home remedies, some work and some don't. When these remedies fail a proton pump inhibitor, such a omeprazole, can be of enormous benefit. It is available over-the -counter. Hope this was helpful. Mark Davis, MD.