The etiology of this disease is unknown, which may be related to infection, heredity, humoral immunity and cellular immunity. It is generally believed that external antigens can react with the gastrointestinal wall after entering the human body, leading to the release of various vasoactive substances and causing diseases.

Typical symptoms: clinical manifestations are abdominal pain, diarrhea, abdominal mass, fistula formation and intestinal obstruction, which may be accompanied by fever, anemia, malnutrition and parenteral damage, such as joints, skin, eyes, oral mucosa and liver.

Diagnostic basis:

1. The clinical manifestations are abdominal pain, diarrhea, abdominal mass, fistula formation and intestinal obstruction, which may be accompanied by fever, anemia, malnutrition and damage to joints, skin, eyes and mouth.

2.x-ray enterography can determine the location of intestinal stenosis by observing the pathological changes of small intestine.

3. Colonoscopy is the most sensitive method to diagnose Crohn's disease.

4. barium enema examination showed that barium shadow showed signs of jumping. For people who are not suitable for colonoscopy.