Whether or not the darkened intestines can be recovered depends on the specific cause of the darkening. If the staining of the intestinal wall is caused by the intake of iron-containing drugs or bismuth preparations, it can usually recover on its own, and attention should be paid to eating more vegetables and other fiber-rich foods, which will help rapid recovery. If it is due to strangulated intestinal obstruction, or mesenteric artery embolism caused by the darkening of the intestinal tube, we should consider the necrosis of the intestinal tube, it is difficult to recover more than the need for surgical resection of the diseased intestinal tube. If it refers to the colon black change disease can not be recovered, this disease is because the intestinal mucosa macrophages contain more lipofuscin, belong to the intestinal mucosa of the black pigmentation, there can be abdominal distension, constipation and other symptoms, generally do not need special treatment, usually pay attention to the appropriate amount of more cabbage, carrots and other food, improve abdominal distension, relieve constipation symptoms can be.