BackgroundImmunoglobulin A vasculitis (IgA V), formerly Henoch–Schönlein purpura, is one of the most common self-limiting vasculitis in children. In 15-20% IgA V cases, gastrointestinal symptoms precede the rashes,they no specific gastrointestinal symptoms and often present as acute abdomen, making the diagnosis difficult.Case presentationWe present two female patients, ages 8 years old and 5 years old, who presented to vomiting and abdominal pain, rashes appeared on the lower limbs a few days later, they were subsequently diagnosed with IgA V. Both patients were given IV methylprednisolone, achieved benign clinical results.ConclusionsWhen gastrointestinal symptoms precede the rashes, it is difficult to diagnose IgA vasculitis, resulting in unnecessary surgery. Early recognition and treatment will promote the remission of the children and avoid unnecessary surgery.