| Anatomical orientation | Etiological classification | Acute common diseases | |
| 1) Local | Peritoneal cavity | Inflammation | Gastritis, enteritis, pancreatitis, hemorrhagic necrotizing enteritis, cholecystitis, purulent obstructive cholecystitis, etc.; reflux esophagitis, spontaneous peritonitis; urinary tract infection. |
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| Viscera rupture | Liver rupture, spleen rupture, etc.; perforation of stomach and duodenal ulcer. | |
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| Obstruction of hollow viscera | Intestinal obstruction, biliary stone, biliary ascariasis, obstruction of kidney and ureter stones, etc.; volvulus, mesentery or torsion of the omentum | |
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| Intra-abdominal vascular lesion | Mesenteric artery embolism, splenic embolism, renal embolism, aneurysm of abdominal acute renal infarction, etc. | |
| Abdominal wall | Abdominal wall | Abdominal wall diseases such as abdominal wall contusion, abscess, and herpes zoster on the abdominal wall | |
| 2) Adjacent | Cardiopulmonary diseases and spinal lesions | Angina, myocardial infarction, acute pericarditis, pneumonia, URTI, pulmonary infarction, pleurisy, hiatus hernia, thoracic vertebrae tuberculosis or tumor | |
| 3) Systemic | Systemic diseases | Such as abdominal allergic purpura, abdominal epilepsy, uremia, hematoporphyria, SLE, and poisoning. | |
| 4) Psychogenic | Neurosis | Abdominal pain neurosis | |
| 5) Female reproductive system | Gynecological disease | Ectopic pregnancy and ovarian rupture, ovarian cyst torsion, and ovarian bleeding | |