Hi welcome to Health care magic forum.
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Your 6 year daughter since 6 months complaining of hot abdomen, and since 2 days had pain abdomen. Before when she was sick you have used miralax
Previously you have used miralax(Composition is poly ethylene glycol) it is a laxative for treating constipation
If there is constipation, you can use it as constipation also causes abdominal pain
Still you should consult a pediatritian for diagnosis and treatment.
Avoid giving her spices, junk foods, and oily foods.
Wishing for a quick and complete recovery.