There is no direct correlation between smoking and blood glucose increase, smoking mainly affects the cardiopulmonary function, which can easily cause arteriosclerosis and respiratory diseases. The main reasons for blood glucose increase include obesity, improper diet, lack of exercise and pancreatic injury. 1. Body obesity: body obesity will lead to abnormal endocrine function, part of which will be accompanied by insulin resistance, causing blood sugar rise. 2. Improper diet: long-term overeating, often eat a lot of sweets, easy to affect the body’s metabolism, resulting in increased blood sugar. 3. Lack of exercise: Lack of physical exercise affects the metabolism of blood glucose in the body, which can also cause blood glucose to rise. 4. Pancreatic injury: Pancreatic injury, such as chronic pancreatitis, may lead to abnormal pancreatic islet cell function, causing blood sugar to rise. On the whole, the relationship between blood glucose and smoking is not close, but smoking itself is harmful to the body, try to quit smoking as a bad habit, if you feel sick, consult a physician, and standardized treatment under the guidance of the physician.