Smoking is mainly bad for chronic pancreatitis, as it can cause pancreatic calcification, which can aggravate the condition of chronic pancreatitis. Smoking is also a risk factor for pancreatic cancer, and patients who smoke heavily for a long time are prone to pancreatic cancer. If a patient already has chronic pancreatitis and smokes heavily for a long time, the incidence of pancreatic cancer will increase significantly due to the dual factors. Pancreatic cancer is a malignant tumor of the pancreas and the chance of surgery is almost lost by the time it is detected. Therefore, for the sake of health, it is recommended that patients suffering from pancreatitis must quit smoking and also quit drinking to avoid recurrent attacks of pancreatitis. Smoking is harmful to health as it can affect the respiratory tract and cause lung cancer. Smoking can also cause digestive system diseases, such as gastroesophageal reflux and gastritis, so it is recommended that patients must strictly quit smoking.