There are many causes of left upper abdominal pain, generally the following: first, it may be caused by common peritonitis disease; second, it may be caused by obstruction of abdominal organs, such as the most common intestinal obstruction disease, which can lead to left upper abdominal pain; third, it may also be caused by stomach disease, such as gastric perforation disease, atrophic gastritis or chronic superficial gastritis, or even Stomach cancer disease can cause pain in the upper left abdomen; fourth, acute pancreatitis can also cause pain in the upper left abdomen; fifth, spleen infarction disease, can also lead to pain in the upper left abdomen; sixth, if intra-abdominal bleeding or tumor disease in the abdominal cavity, can lead to pain in the upper left abdomen. No matter what the cause of the left upper abdominal pain, you need to go to the hospital in time to clarify the cause, according to the different causes, and then choose the corresponding method to treat. At the same time, patients must pay attention to avoid serious diseases because of untimely treatment, but patients should not be overly nervous, generally timely detection and timely treatment, can be recovered.