Hard and long strip in the left lower abdomen may be caused by constipation, intestinal obstruction, intestinal tumors, the patient should consult a doctor in time, after clarifying the cause of the disease, and then carry out the corresponding treatment. 1. Constipation: i.e., less than 3 times a week, patients will have a hard and long strip in the left lower abdomen, which is caused by the dryness of feces in constipation. 2. Intestinal obstruction: when the contents of the intestines cannot run normally and pass smoothly due to various reasons, the patient may have the sign of hard and long stripes in the lower left abdomen, accompanied by stopping of defecation and vomiting and other symptoms. 3. Intestinal tumors: hard and long strip in the left lower abdomen may be intestinal tumors, and this kind of people may also have symptoms such as blood in stool and weight loss. If you find hard and long stripes in the left lower abdomen, you should go to the hospital in time, complete the examination, make a clear diagnosis and follow the doctor’s instructions.