Thank you very much for contacting healthcare magic. In acid reflux disease lower oesophagus sphicter is relax position so back flow of acid occur from stomach to oesophagus. In vomiting more acid is mostly because of reflux disease. Treat a gastric reflux disease by taking folowing care.... Avoid spicy foods and oily foods. Avoid citrus foods consuption. Start proton pump inhibitor drugs under doctor s suggestion. Eat small amount in meal. Avoid immeadiat sleeping after meal. Take higher position of your head during sleeping time. Consent a gastroenterologist for further diagnosis. I hope my guidance is helpful to you. Thanks.