Constipation: This is a common issue in children that can cause intermittent sharp abdominal pain, especially if the constipation is severe and the child is straining during bowel movements.

Gastroesophageal Reflux Disease (GERD): Can cause sharp chest and abdominal pain, especially after eating.
Functional Abdominal Pain: A common condition in children characterized by recurrent abdominal pain not explained by other medical conditions.
Urinary Tract Infection (UTI): Can cause sharp pain in the abdomen, especially if the infection involves the kidneys.
Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease and ulcerative colitis can cause intermittent sharp abdominal pain.

Appendicitis: Although it typically presents with continuous pain, appendicitis can sometimes cause intermittent pain and is a medical emergency.
Intussusception: A condition where a part of the intestine slides into another, which can cause intermittent severe abdominal pain and is a surgical emergency.
Pneumonia: Can cause referred abdominal pain, especially if the pneumonia is in the lower lobes of the lungs.
Diabetic Ketoacidosis: Can cause severe abdominal pain and is a medical emergency.

Meckel's Diverticulum: A congenital anomaly of the small intestine that can cause intermittent abdominal pain, especially if it becomes inflamed or obstructed.
Pancreatitis: Inflammation of the pancreas, which can cause severe abdominal pain and is rare in children but can be associated with certain medications, trauma, or genetic conditions.
Ovarian Torsion: A condition where the ovary twists around its ligaments, cutting off blood supply, and can cause severe intermittent abdominal pain in girls.
Hernias: Such as inguinal or umbilical hernias, which can cause intermittent pain if they become incarcerated or strangulated.