Hi In my opinion, the visit to a pediatrician is a must for diagnosis and management of your child s illness. Sudden abdominal pains with severe tenderness can be an episode of bowel obstruction, complicated appendicitis, pancreatitis, peritonitis, colics due to stones etc. All these conditions need immediate doctors interventions. They may ask for some blood and urine examination, X ray abdomen and ultrasound abdomen to come to a definitive diagnosis. You can give your child dicyclomine and acetaminophen for immediate pain relief before you visit ER. Take care For further questions, do contact us.