Common causes of abdominal pain in children include:

• Bladder infection
• Celiac sprue
• Colitis
• Constipation
• Depression
• Drug side effects
• Emotional distress
• Excessive gas
• Familial Mediterranean fever
• Food poisoning
• Food intolerance
• Food allergy
• Gastritis
• Gluten sensitivity
• Hiatal hernia
• Irritable bowel disease
• Lactose intolerance
• Malabsorption syndrome
• Menstrual pain
• Mesenteric lymphadenitis
• Peptic ulcer disease:
• Stomach ulcer
• Duodenal ulcer
• Viral gastroenteritis
• Urinary tract infection

Causes for abdominal pain in children also vary with age:

Causes of abdominal pain in children less than 1 year old include:

• Constipation
• Gastroenteritis
• Hirschsprung's disease
• Incarcerated hernia
• Infantile colic
• Intussusception
• Urinary tract infection
• Volvulus

Causes of abdominal pain in children 2 to 5 years old include:

• Appendicitis
• Constipation
• Gastroenteritis
• Intussusception
• Mesenteric lymphadenitis
• Sickle cell crisis
• Urinary tract infection
• Volvulus

Causes of abdominal pain in children 6 to 11 years old include:

• Appendicitis
• Constipation
• Gastroenteritis
• Mesenteric lymphadenitis
• Pharyngitis
• Pneumonia
• Sickle cell crisis
• Urinary tract infection

Causes of abdominal pain in children 12 to 18 years old include:

• Appendicitis
• Constipation
• Dysmenorrhea
• Ectopic pregnancy
• Gastroenteritis
• Ovarian cyst disease
• Ovarian torsion
• Pelvic inflammatory disease
• Testicular torsion
• Threatened miscarriage