Under normal circumstances, the stool can also have a small amount of mucus, constipation due to the stool is not easy to discharge, mucus will be more obvious, if there is no obvious abnormality in the stool routine, it may be a normal physiological phenomenon. In addition, constipation and mucus stool can also occur in some diseases, such as inflammatory bowel disease, colorectal tumors and so on. 1. Inflammatory bowel disease: usually includes ulcerative colitis, Crohn’s disease, etc. When the patient suffers from these diseases, the intestinal function will be disturbed, so constipation may occur. At the same time, the intestinal inflammatory response is more intense, the intestinal wall is swollen and congested, and mucus inflammatory products will be produced. Thus, there will be mucus on the stool when constipation is manifested. 2. Colorectal tumor: patients with colorectal tumor can lead to intestinal obstruction and constipation, and pathological changes such as intestinal erosion, congestion and edema can also lead to the phenomenon of constipation with mucus. Constipation with mucus may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then follow the doctor’s instructions to give targeted treatment.