Abdominal pain, also known as a stomach ache, is a symptom associated with both non-serious and serious medical issues. Common causes of pain in the abdomen include gastroenteritis and irritable bowel syndrome. About 15% of people have a more serious underlying condition such as appendicitis, leaking or ruptured abdominal aortic aneurysm, diverticulitis, or ectopic pregnancy. In a third of cases the exact cause is unclear. Given that a variety of diseases can cause some form of abdominal pain, a systematic approach to the examination of a person and the formulation of a differential diagnosis remains important.
symptom of Intussusception 
symptom of Necrotizing enterocolitis
symptom of Hiatal hernia
symptom of Bowel obstruction
symptom of Short bowel syndrome
symptom of Small intestine cancer
symptom of Vaginitis
symptom of Gastritis