Enlarged mesenteric lymph nodes in the abdominal cavity also need to be analyzed according to the specific cause of the enlarged lymph nodes. If the enlarged mesenteric lymph nodes are caused by an intestinal infection in the abdominal cavity, this is not a major problem and is a common cause of abdominal pain in children. It can be gradually relieved by the application of antibacterial drugs. In daily life, a regular diet should be given, attention should be paid to dietary hygiene, avoid overeating, avoid eating spicy, greasy, cold, salty and other stimulating foods, and attention should also be paid to keeping the abdomen warm from cold. For other causes of mesenteric lymph node enlargement, caution should also be taken. Especially if there is intestinal cancer, such as mesenchymal tumor of gastrointestinal tract, colon cancer, rectal cancer, etc., significant lymph nodes are likely to have metastasis. It is also necessary to thoroughly remove the metastatic lymph nodes and do the corresponding mesenteric resection during surgery in order to achieve the effect of surgical radical treatment, so that patients can obtain a better survival period after surgery and reduce the chance of recurrence and metastasis after surgery.