Constipation: This is a common issue in children, often presenting with abdominal pain, particularly after eating due to the gastrocolic reflex which can exacerbate constipation symptoms.

Functional Abdominal Pain: A common condition in children, characterized by recurrent abdominal pain not explained by other medical conditions, often related to eating or bowel movements.
Gastroesophageal Reflux Disease (GERD): Although more commonly associated with upper abdominal or chest pain, GERD can sometimes cause lower quadrant pain, especially if there is an association with eating.
Lactose Intolerance or Other Food Intolerances: These conditions can cause abdominal pain after consuming specific foods, due to the inability to digest certain nutrients.

Appendicitis: Although less common in this age group and presentation, appendicitis is a critical diagnosis that must be considered, especially if the pain is severe, persistent, or accompanied by fever, vomiting, or rebound tenderness.
Intussusception: A condition where a part of the intestine slides into an adjacent part, which can cause severe abdominal pain, vomiting, and bloody stools. It's more common in younger children but should be considered in any child with severe abdominal pain.
Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease and ulcerative colitis can present with chronic abdominal pain, changes in bowel habits, and sometimes blood in the stool.

Meckel's Diverticulum: A congenital anomaly of the small intestine that can cause abdominal pain, gastrointestinal bleeding, or intestinal obstruction, though it's more commonly diagnosed in infancy.
Malrotation with Volvulus: A condition where the intestine twists around itself, cutting off its blood supply. It's a surgical emergency and can present with severe abdominal pain and vomiting.
Ovarian Torsion or Ovarian Cyst: In prepubescent girls, these conditions can cause severe lower abdominal pain, often sudden in onset, and may be associated with nausea and vomiting.