Irritable bowel syndrome is a functional disease, and the hazards are as follows: 1. Physical hazards: manifested as abdominal pain, diarrhea and constipation, which affects the quality of life. Long-term eating less, diarrhea and constipation alternately exist in the mixed type easily lead to malnutrition, anemia, wasting, depression, emotional abnormalities, etc.; 2, physical and mental hazards: irritable bowel syndrome mostly due to severe psychological stress affecting life and work, emotional deterioration will aggravate mental stress, a vicious cycle can even eventually lead to schizophrenia.