Irritable bowel syndrome manifests clinically as habitual diarrhea. The disease is caused by work stress, brain overwork caused by the “brain-gut axis” dysfunction, office buildings, white-collar workers are most vulnerable to this disease. Etiology: 1, irritable bowel syndrome (IBS) common patient abdominal cramping pain, abdominal flatulence and defecation habit changes. Some patients have symptoms of constipation (difficult or reduced bowel movements), others have diarrhea (frequent loose stools, often with a sense of emergency bowel movements), and others have experienced both diarrhea and constipation. Sometimes patients have crampy abdominal pain and want to pass stool but cannot do so. 2. The cause of irritable bowel syndrome is dysfunctional. Because no signs of organic disease are found in the colon examination. The disease can cause great discomfort and pain, but does not cause lasting colon damage or distress; the patient may be afraid to participate in social activities, to go out and find a job, or even to go out for a short trip. However, some patients with irritable bowel syndrome are able to control their symptoms through diet, regulating tension, and taking medications prescribed by their doctors. Because doctors do not find an organic lesion, irritable bowel syndrome is often thought to be caused by emotional conflict or stress. However, studies have shown that while depression, anxiety and stress in life can exacerbate the condition, other factors are also important. Studies have found that the colonic muscles of people with irritable bowel syndrome spasm at the slightest stimulus, and that colon sensitivity as well as reactivity are higher than normal, so they respond to stimuli that most people would not have an effect on. 4. Medical studies have shown that common events such as eating, abdominal distention and accumulation of colonic food can lead to allergic reactions in patients with irritable bowel syndrome. Certain medications or foods may trigger colonic spasms in some people. Sometimes the intestinal spasm delays the passage of stool and leads to constipation. Chocolate, dairy products or large amounts of ethanol are often triggers, and caffeine can cause loose stools in many people, but is more likely to affect people with irritable bowel syndrome. Studies have also found that women with irritable bowel syndrome have worse symptoms during menstruation, suggesting that fluctuating hormone levels can exacerbate symptoms in people with irritable bowel syndrome.