What causes pain on the left side of the abdomen?

Pain on the left side of the abdomen, first need to consider whether the discomfort caused by digestive system diseases, more common in people with unclean diet, overeating. Secondly, there is also the possibility of urinary system diseases, such as ureteral stones, kidney stones and other diseases. If the pain can not be relieved. It is recommended to develop good habits, early to bed and early to ensure adequate and good sleep quality. Abstinence from bad habits, do not smoke and drink, show discomfort and seek medical advice in time.