Crohn's disease is an inflammatory bowel condition, and its specific causes are not yet very clear. It may be related to environmental factors, lifestyle factors, dietary factors, and genetic factors, and it occurs more often in males than in females. The prevalence of Crohn's disease is relatively low in China. Typical symptoms of Crohn's disease include abdominal pain, diarrhea, intestinal obstruction, and some patients may experience fever, oral mucosal lesions, and liver abnormalities. The current treatment is mainly medication combined with surgical intervention. During active periods, it is important to rest, consume a low-fat, high-nutrition diet, replenish water and electrolytes timely, and if anemia is present, appropriately supplement with B12 and folic acid. Patients with hypoproteinemia should be given albumin.