Pancreatic cancer, which is usually found at an advanced stage, is mainly due to atypical symptoms. However, when patients suddenly develop abnormal blood sugar, chronic abdominal pain, fatty leaking and other atypical symptoms, it is important to pay attention to the possibility of this disease. Usually, the first step is to check the tumor markers, and abdominal enhancement CT or MRI, if still no cause is found, it is very necessary to do an ultrasound endoscopy at this time. Ultrasound endoscopy is by far the most sensitive method to detect small pancreatic cancer.