A 5-year-old patient arrives in the ER with his mother. The patient has a skin rash and shows signs of nausea and belly

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A 5-year-old patient arrives in the ER with his mother. The
patient has a skin rash and shows signs of nausea and belly pain.
The skin rash appeared to be small, reddish-purple spots. The
doctor asked the mother what their meal was before the symptoms
showed. According to the patient’s mother, they were eating eggs
for breakfast, then hours later, the symptoms have shown. What can
be the disorder of the patient? Explain.