Hi Dear, Welcome to HCM. Understanding your concern. As per your query you have symptoms of chronic indigestion which are pointing towards a condition known as GERD ( gastrointestinal reflux disease ) and called acid reflux disease . It could be due to poor electrolyte balance of body. Simple alteration in lifestyle can give relief from this condition . As this condition create acidic condition in digestive system body produce excessive saliva to neutralize the acidic content . I would suggest you to : - Eat light meals specially before going to bed . - Avoid eating heavy and spicy food . - Take antacid like gelusil . - Also take little walk after every meal . Consult gastroenterologist for proper examination . He/she will rule out conditions like pancreatitis, liver disease, serotonin syndrome, oral ulcers, and oral infections. Doctor may prescribe drugs like ranitidine and omeprazole to block the acid production . Get Well Soon. Best Wishes, Dr. Harry Maheshwari