Pancreatic cancer may cause blood sugar increase, because after suffering from pancreatic cancer, the normal tissues of pancreas will be damaged, and then the islet cells will be reduced, and the reduction of islet cells will cause the reduction of insulin secretion, which will cause the blood sugar increase. Therefore, after suffering from pancreatic cancer, if the blood sugar rises, it is necessary to find the attending physician to give relevant treatments, such as oral hypoglycemic drugs or percutaneous insulin administration, etc. During the period of elevated blood sugar, the patient should be treated by a doctor. During the period of elevated blood glucose, attention should be paid to diet, for example, not to drink alcohol-containing beverages, not to eat too greasy food, not to eat too sweet food, appropriate intake of fresh fruits and green vegetables, appropriate intake of low-fat high-quality proteins, commonly found in fresh fish and shrimp. Meanwhile, the diet needs to be consumed in accordance with the diabetic diet, and the specific dosage or type needs to be consulted with the endocrinologist.