Hi, it could be due to Gastritis.
Avoid foods and drinks that trigger pain. Everyone has specific triggers. Common triggers such as fatty or fried foods, tomato sauce, alcohol, chocolate, mint, garlic, onion, and caffeine may make pain worse. Avoid foods you know will trigger your heartburn.
Eat smaller meals. Avoid overeating by eating smaller meals.
Don't lie down after a meal. Wait at least three hours after eating before lying down or going to bed.
Don't smoke. Smoking decreases the lower esophageal sphincter's ability to function properly.
Consult Physician for medications....
Abdominal pain has many potential causes. Many causes, such as gas pains or a pulled muscle, aren't serious, while other conditions require timely medical attention.
Often, the location of the abdominal pain can provide an important clue as to its cause. At other times, abdominal pain may occur in unexpected patterns, and its cause is less obvious. Nonetheless, it is helpful to think about abdominal pain in terms of its location...possible causes may be Mesenteric lymphadenitis (swollen lymph nodes in the folds of membrane that hold the abdominal organs in place)
Pancreatitis (pancreas inflammation)
Peritonitis (infection of the abdominal lining)
Gastric ulcer etc...
Consult nearest gastroenterologist they will help you further