An overview of the gastroesophageal reflux disease has been provided in this book. Gastroesophageal Reflux Disease (GERD) has been a major concern for many people who are affected by this disease. People affected by GERD live under a constant threat of deteriorating quality of life and also, a latent risk of becoming cancer infected. Furthermore, it has been a financial burden for both the diseased and the society. This book aims at providing the gastroenterologists, with an insight into GERD, and helping them to manage and combat this severe disease.