Pancreatic head occupation suggests that there are occupying lesions in the head of the pancreas, mainly tumors, which are classified into benign tumors and malignant tumors. Benign tumors of pancreas are also more common, such as pancreatic cysts and some pseudocysts, sometimes the pseudocysts are bigger, and local drainage treatment can be carried out after the symptoms appear, and regular observation is usually done in the absence of symptoms. The malignant lesion of pancreatic head is mainly pancreatic head cancer, once pancreatic head cancer develops gradually, it will show symptoms of compression of surrounding tissues, and the most obvious ones are obstructive jaundice, emaciation, fatigue, fever, abdominal pain, diarrhea, etc. The degree of malignancy of pancreatic head is relatively high. Pancreatic head cancer is of high malignant degree and progresses rapidly, and local liver metastasis and distant metastasis will appear obviously. After the discovery of pancreatic head occupation, it is necessary to further clarify whether it is benign lesion or malignant lesion and carry out corresponding treatment.