Hello dear, The symptoms suggest that you might be having Gastro esophageal reflux disease, which is caused by the reflux of acid from stomach to esophagus due to relaxation of the sphincter at the lower part of esophagus. The lump in the stomach as mentioned in your post is Hiatal hernia. Management consists of: 1. Lifestyle modification- like weight reduction, sleeping on the left side, or with upper body raised. 2. Dietary modification- avoid consuming irritating substances such as acidic & rich foods, caffeine, nicotine, and alcohol. 3. Medical management- Proton pump inhibitors like Omeprazole, Pantoprazole (which prevent acid formation in stomach) 4. The Hiatal hernia needs to be managed surgically. So, it will be better to consult your treating Doctor/ Gastroenterologist. Investigation like Ultrasound scan of abdomen & Upper GI endoscopy will be helpful in clinching the diagnosis. Wish you a good health. Take care.