Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain it pain in stomach and excess saliva production is your problem that occurs a few hours after you eat and disappears immediately after eating.. Well, such similar symptoms are commonly seen in patients suffering from acid reflux, in which acid regurgitates from stomach to throat and mouth and can cause hypersalivation.. As during and after eating the acid is consumed in digesting the food therefore the symptoms subsides.. I would suggest you to consult a Gastroenterologist and get evaluated and a thorough clinical evaluation and investigations like upper G.I Endoscopy can help in diagnosis and treatment can be done accordingly.. You can be advised to take Proton Pump Inhibitors like Omeprazole or Pantoprazole.. Take antacids like Milk of magnesia.. Avoid spicy food and drink plenty of water.. Always take walk after meals and take your dinner atleast 2 hours before sleep.. You should sleep with head slightly raised as compared to feet.. As of now you can use antiseptic mouthwash gargles 2 to 3 times a day as they have drying effect in mouth and will relieve in excess salivation.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.