Acute Abdominal Pain Differential Diagnosis / Causes Mnemonic

"BAD GUT PAIN" 

Bowel obstruction
Appendicitis, Adenitis (mesenteric)
Diverticulitis /Diabetic Ketoacidosis
      Dysentary/Diarrhea Drug withdrawal

Gastroenteritis/Gall bladder disease/stones/obstruction/infection
Urinary tract obstruction (stone)  infection (pyelo/cystitis)
Testicular Torsion/ Toxin - Lead, black widow spider bite

Pneumonia/Pleurisy/ Pancreatitis/ Perforated bowel/ulcer
         Porphyuria
Abdominal aneurysm
Infarcted bowel / Infarcted myocardium (AMI)
        Incarcerated hernia / Inflammatory bowel disease
Splenic rupture/infarction / Sickle cell pain crisis / Sequestration crisis