Hi ! Abdominal pain
in case of children could be very much perplexing.
Does your son have a sore throat/ other respiratory tract
infection. In such cases, both fever and abdominal pain are likely to occur specially in paediatric patients.
When was he dewormed last ? Sometimes worms do persist in the abdomen even though the stool test
may be normal. So consider deworming him on consultation with your paediatrician.
could be due to any kind of infection. I have already mentioned about RTI. Other infections could be a gastro intestinal infection due to eating something outside which was not hygeinic, and also could be a urinary tract infection
which can give rise both to a high fever and abdominal pain. So one should also go for a urine test both routine/microscopic and a culture/sensitivity.
Seeing the duration of the fever and tummy aches, one more infection one has to exclude is the enteric fever
for which blood tests has to be done on advice of your doctor and accordingly the management also changes.
Over and above, you have to take special care on his diet specially with a history of lactose intolerance
In my opinion, you should soon see your paediatrician specially because of the high fever he is having.
Hope this helps you. I wish your son an early recovery.