Black stools, also known as tarry stools, after laparoscopic surgery may be caused by bleeding in the digestive tract, which may be caused by sudden inflammation of the digestive tract, digestive diseases, postoperative medications, and stressful trauma to the digestive tract during surgery. Patients with small amount of bleeding mostly have black stools, while those with large amount of bleeding may have symptoms such as vomiting blood, dizziness, etc. If a large amount of bleeding occurs within a short period of time, it may even cause pulse, blood pressure drop, hemorrhagic shock, etc. It is recommended that the diet should be based on fluids, avoiding hard objects that may stimulate the lining of the gastrointestinal tract, and that the patient go to the hospital for a fecal occult blood test to check the hemoglobin, red blood cell concentration, and counts, and have the doctor make a judgment based on the results of the test. The doctor will make a judgment based on the test results and determine the direction and means of treatment.