Black stool means black stool, stomach growling means hyperactive bowel sounds, black stool and hyperactive bowel sounds are not necessarily bowel cancer. There are many reasons causing black stool and hyperactive bowel sounds, generally consider dietary factors, medication factors, gastrointestinal bleeding and other reasons, further examination is needed to clarify the cause of the disease, and timely symptomatic treatment. 1. Dietary factors: when the human body to eat some high iron content of food, such as green vegetables, meat food will cause black stool color, but also can be accompanied by intestinal tinnitus performance. 2. Drug factors: when the body takes iron supplements for blood, bismuth and activated charcoal powder (tablets) to treat gastric disease, etc., can cause black stools, and can also be accompanied by intestinal tinnitus hyperperformance. 3. Gastrointestinal bleeding: if the patient suffers from gastric ulcer, duodenal ulcer, rupture of the esophageal vein at the base of the stomach, etc., it can lead to black stools and be accompanied by intestinal tinnitus and other manifestations. 4. Black stool, hyperactive bowel sounds and other manifestations can not be sure that it is bowel cancer, because bowel cancer can not be determined solely on the basis of symptoms or clinical manifestations, but must rely on auxiliary examination, physician’s physical examination and other relevant examinations to confirm the diagnosis. It is necessary to go to the hospital for consultation and targeted treatment after clear diagnosis of the cause of the disease, and one should not use medicines indiscriminately.