Thank you for your query.
I would appreciate if you note the following regarding the stomach ache:
1. What time of the day does it occur?
2. How long does it last?
3. Any relationship with meal?
4. Apart from massaging the tummy what else gives him relief?
5. Any associated vomiting
or loose motions?
These would help the doctor in finding a cause for the stomach ache. In the mean time a stool routine examination and, if required, an ultrasound
of the whole abdomen can be done.
If massaging the tummy with oil gives your son some relief then you can try warm fomentation.
I hope I have answered your query to your satisfaction.
Wishing your son an early recovery.