Pancreatic malignancy is one of the more common diseases in clinical practice. Generally speaking, the occurrence and development of malignant tumors have certain causative factors and aura. So what are the precursors of pancreatic malignant tumor, let’s learn together. The specific pathogenesis of pancreatic malignant tumor is still not fully researched and cleared clinically, but patients with pancreatic malignant tumor will have the following aura before the onset of the disease: 1. Patients will have left-sided low back pain for a long time, and the pain cannot be completely relieved, and the abdominal pain can be aggravated after eating. 2. Patients will have weakness, and the symptoms will be obviously aggravated after activities. There is not enough energy and strength to do things, loss of appetite, weight loss and other symptoms, which is caused by the decrease in pancreatic enzyme secretion content and the patient’s digestive and absorption function is obviously reduced. 3, the patient obviously aversion to oil, spicy, stimulating food, eating meat and oil, indigestible food will be accompanied by obvious abdominal distension, abdominal pain and other symptoms. Some patients may have recurrent episodes of pancreatitis, poor excretion of pancreatic enzymes, and repeated damage to pancreatic parenchymal cells after activation, resulting in complications such as peripancreatic effusion and pancreatic pseudocysts. 5. Early parenchymal lesions of the pancreas, if they cause compression of the arteriovenous vessels of the spleen, some patients may experience obstruction of venous blood return to the spleen, resulting in congestive enlargement of the spleen, and a huge spleen may be palpable under the left costal arch. If the patient inadvertently receives an impact injury to the left upper abdomen, it may cause pathological rupture and bleeding of the spleen. Once the above signs appear, patients need to improve the pancreatic ultrasound or enhanced CT examination as soon as possible to clarify the specific nature of pancreatic lesions, and if necessary, perform surgery as soon as possible, and patients with early disease can often achieve certain treatment results.