Constipation for ten days without defecation may be dangerous, stool for a long time may cause intestinal diseases, intestinal dysfunction, urinary system diseases and so on. 1. Intestinal diseases: (1) Constipation for ten days without defecation may eventually cause hemorrhoids, anal fissure, or even prolapse, repeated intestinal disorders, constipation, and possibly tumors of the intestines, etc.; this is due to the fact that hardened stools passing through the anus can cause mechanical damage to the anus, resulting in hemorrhoids or fistulas and other conditions. (2) In addition, long-term toxins can cause irritation to the colonic mucosa, which may lead to intestinal obstruction or incomplete intestinal obstruction. 2. Intestinal dysfunction: the toxins produced by the fermentation of discharged feces are located in the colon for a long time, which can easily lead to intestinal flora imbalance, causing abdominal pain and bloating and other manifestations. 3. Urinary system diseases: the accumulation of feces may press the bladder and cause urinary retention, often urinate poorly, prone to infectious diseases of the urinary system. If the symptoms are not relieved after lifestyle modification, you should consult a doctor in time to clarify the cause of the disease and under the guidance of the doctor.