Thanks for posting your query.
Does he have acidic belching/ abdominal discomfort/ excessive flatulence/ gargling sound in abdomen/ abdominal bloating
after taking meals?
Does he have yellow discoloration of eyes and urine?
With the available described symptoms, there appears to be possibility of peptic ulcer disease
or persisting gastroenteritis
You should consult with internal medicine specialist/ gastroenterologist and should go for thorough check up.
He should also go for ultrasound
imaging, endoscopy and serum amylase and lipase, thyroid profile, blood sugar level, and serum calcium.
He should also go for urea breathe test for H. Pylori.
If Urea breathe test is found to be positive then you have to take complete eradication therapy for H. Pylori bacteria.
Meanwhile, he should take proton pump
inhibitors along with prokinetics for relief of your symptoms.
Avoid oily and spicy food.
Dr. Mayank Bhargava