<s>[INST] My son is 3 years old and woke up this morning that his stomach hurts.  He ate breakfast and then would complain again that his stomach hurts.  I asked him every time if he needed to throw up assuming he had the flu, he did not need to throw up.  He tried to distract himself throughout the morning he kept complaining until he was in excruciating pain.  I am now waiting to hear from the doctor at the hospital.  What do we do? [/INST] Hi. Thanks for your query. The boy is just 3 years old, the causes of pain in abdomen in this age-group are a bit different. Commonest are:Abdominal lymphadenopathy. Appendicitis Worms. Consult a Pediatric Surgeon for a clinical examination. Go for the tests of blood, urine and stool. And an ultrasonography to confirm or to rule out the causes. A course of an antibiotic and anti-inflammatory medicines may help him. </s>