Hard strips in the left lower abdomen can be seen for the following reasons: First, elderly patients who have been bedridden for a long time may suffer from habitual constipation, which can be fecal masses left in the intestinal canal, mainly in the descending and sigmoid colon, and the patient may also suffer from abdominal distension and difficulty in defecation, and may choose the method of enema. Second, some patients are caused by intestinal diseases, the most common of which are tumors in the intestinal tract, namely the sigmoid colon and descending colon, colon cancer is more common, patients will also have a loss of appetite, weight loss, abnormal bowel movements, mainly manifested as unformed stools, blood in the stool or black stool. The most common site of metastasis is the liver, and patients may also experience significant weight loss and even jaundice. For early diagnosed malignant tumors of the colon, radical resection should be actively selected for treatment.