Abdominal nodules are abnormal tissue growths in the abdominal cavity. There are many causative factors, such as bacterial infection, viral infection, tuberculosis infection, autoimmune system diseases, hematological system diseases, allergic factors, etc. Sometimes they are also caused by lymph node metastasis of malignant tumors or parasitic diseases. It is necessary to go to the hospital for further improvement of relevant tests, such as blood routine, C-reactive protein, liver function, tumor markers, hepatitis B five, infection four, glucose determination, autoimmune antibody, etc. Imaging tests such as abdominal ultrasound, abdominal CT, abdominal MRI, etc., and sometimes enhanced scan, imaging or PET-CT, etc., are also needed. During the examination, patients should not drink alcoholic beverages and should not eat spicy food.