Children with hypoechoic nodes in the abdominal cavity may be caused by abdominal lymph node enlargement and mesenteric lymphadenitis, the severity is based on the symptoms of abdominal lymph node enlargement and mesenteric lymphadenitis and the extent of the disease. 1. Enlarged abdominal lymph nodes: If the lymph nodes are enlarged due to mild inflammation, there may be abdominal pain, fever and other symptoms, which can be treated with drugs such as cefuroxime and penicillin, which are not serious at this time. If malignant tumor occurs in the abdominal cavity, the tumor cells may have lymph node metastasis resulting in lymph node enlargement, which requires surgical treatment and is more serious at this time. 2. Mesenteric lymphadenitis: mostly caused by upper respiratory tract infection in the ileum, large intestine area mesenteric lymphadenitis, there can be weakness, abdominal pain and other symptoms, with cefazolin, amoxicillin and other drugs, this time is not serious. If complicated by intestinal obstruction, need to be treated by surgery, at this time more serious. Children with hypoechoic nodules in the abdominal cavity is recommended to standardize the treatment under the guidance of the doctor. Usually pay attention to eat some easy to digest food, avoid eating spicy stimulating and cold food.