Mesenteric lymph nodes are often caused by infection, allergy, malignant tumor metastasis and other reasons, as follows: First, infection: when the body suffers from bacterial or viral infection, it can cause the enlargement of mesenteric lymph nodes, you need to go to the hospital to improve the relevant examination, such as blood routine, C-reactive protein, if it is considered to be caused by bacterial infection, you need to give antibiotics for treatment, commonly used drugs are cephalosporins, antibiotics, penicillin antibiotics and so on. If it is considered to be caused by viral infection, it needs to be treated with antiviral drugs, and at the same time, it can be treated with traditional Chinese medicine; secondly, allergic factors: it needs to actively get rid of allergens, and at the same time, take oral Chinese medicine for treatment; thirdly, malignant tumor metastasis: it may be caused by lymph node metastasis of malignant tumor, it needs to actively search for the primary tumor, perform radical resection of the tumor, and then In the later stage, chemotherapy, targeted drug therapy and Chinese medicine treatment may be required.