Constipation and diarrhea will not appear at the same time, but may appear alternately, mostly due to irritable bowel syndrome, intestinal polyps, intestinal malignant tumors, ulcerative colitis and other causes.
1. Irritable bowel syndrome: this disease is a functional disease, which may be caused by improper diet, mental factors and other gastrointestinal dysfunction, resulting in changes in stool properties, constipation and diarrhea alternately.
2. Intestinal polyps: abnormal growth tissue protruding from the surface of intestinal mucosa, manifested as constipation, blood in stool, secondary infection can be seen in mucous blood stool, diarrhea and constipation alternately.
3. Intestinal malignant tumor: manifested by changes in stool properties, bloody stool, constipation, diarrhea and other symptoms.
4. Ulcerative colitis: the etiology of the disease is more complex, is a diffuse inflammatory disease of the colon, manifested as diarrhea, constipation alternating, discharge of mucus pus and blood stools and other symptoms.
Constipation and diarrhea alternately, it is recommended to seek medical attention to identify the cause of the disease and comply with medical advice.