Symptoms of irritable bowel syndrome

summary

Irritable bowel syndrome (IBS) is a kind of functional bowel disease characterized by abdominal pain or abdominal discomfort with changes in defecation habits. IBS is one of the most common functional intestinal diseases. According to the questionnaire survey in the general population, 10% - 20% of IBS patients reported in Europe and America, 7.3% in Beijing and 5.6% in Guangzhou. Most of the patients were young and middle-aged, and the first onset after 50 years old was rare. The ratio of male to female is about 1:2. Here are some common manifestations of irritable bowel syndrome.

Symptoms of irritable bowel syndrome

Abnormal gastrointestinal dynamics: in physiological condition, the basic electrical rhythm of colon is slow wave frequency of 6 times / min, and the slow wave frequency of 3 times / min is related to segmental contraction. The irritable bowel symptoms mainly include constipation and abdominal pain, and the slow wave frequency of 3 times / min increases significantly. In normal people, high amplitude contractile wave of colon mainly appears before and after eating or defecating, which is related to long-distance propulsive movement of intestinal contents. Diarrhea type irritable bowel syndrome often shows obvious increase of high amplitude contractile wave. Radionuclide imaging showed that the transit time between mouth and cecum of diarrhea type IBS was significantly faster than that of normal people, while that of constipation type IBS was just the opposite.

Visceral paresthesia: rectal balloon inflation test showed that the inflation pain threshold of irritable bowel patients was significantly lower than that of the control group. Ileal motility study found that the increase of ileal propulsive peristalsis can cause abdominal pain in 60% of patients with irritable bowel, while only 17% of healthy controls.

Mental factors: psychological stress has a significant impact on gastrointestinal movement. A large number of investigations show that irritable bowel patients have personality abnormalities, the scores of anxiety and depression are significantly higher than those of normal people, and the frequency of stress events is also higher than that of normal people. However, the study also found that patients who seek medical treatment because of symptoms have more mental and psychological disorders and are more sensitive and strong to stress reaction than those who do not seek medical treatment because of symptoms. Therefore, there are two views about mental factors in irritable bowel disease, one is that irritable bowel is the abnormal response of the body to various kinds of stress, the other is that mental factors are not the direct cause, but can induce and aggravate symptoms, so that patients can seek medical treatment.

matters needing attention

The irritable bowel symptoms of some patients occurred after the cure of intestinal infection, which was related to the severity of infection and the time of antibiotic application.