At present, there is no clear cause for pancreatic cancer. The occurrence of the disease may be commonly related to the following factors: 1. family genetic factors: people with family history of pancreatic cancer have a higher incidence rate; 2. environmental factors: including carcinogens in the atmosphere, drinking water and diet, patients may be more prone to tumor malignancy after being exposed to carcinogens; 3. bad dietary habits: such as frequent consumption of overly hot food and pickled and moldy food will increase the chance of pancreatic cancer; 4. Helicobacter pylori infection may increase the chance of pancreatic cancer.