Hi,

Thanks for the query.

The possibilities of abdominal pain above the belly button is usually of gastric origin like gastritis, dyspepsia, peptic ulcers and rarely it could be due to pancreatic problem. Pancreatic pain causes severe pain.
The history of vomiting with hives suggests food allergy.
Therefore it is worthwhile getting an ultrasonography of the abdomen, stool examination and a complete blood count to look for eosinophilia. If they are normal, you can try giving her symptomatic course of antacid and anti spasmodic medications before considering an invasive test like endoscopy.

Sometimes or rather most of the times, mild pain in this age group is usually functional and no exact cause can be determined. Hence as you start her on course of antacid and antispasmodic medication, also look for any mental stressors which are known to cause or aggravate the symptoms and try to address them.

Hope this answers your query. Let me know if you need clarification.

Wish her a speedy recovery.

Regards

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