Defecation is a kind of nerve reflex movement, which causes the center of the body's defecation reflex, including the high-level center of the cerebral cortex and the defecation center of the sacrum. The high-level center has a certain control effect on the low-level center.

The impulse process is as follows : when feces enter the rectum, the rectal flushing indirectly stimulates the baroreceptors at the end of the rectum, and then the afferent impulse is transmitted to the fecal center along the afferent fibers of the sacral nerve and hypogastric nerve.

The impulse from the central nervous system along the parasympathetic nerve of the pelvic nerve will easily bring about the contraction of the descending colon, sigmoid colon and rectum. At this time, the internal sphincter in the anus reflexively relaxes.

At the same time, the contraction ability of the outdoor sphincter is strengthened. Under normal circumstances, the defecation reflex is carried out under the control of the cerebral cortex, but if the defecation environment is not allowed or the defecation is interrupted intentionally , the impulse transmitted from the cerebral cortex can inhibit the action of the sacral defecation center. Activity.

Strengthen the contraction ability of the external sphincter, and the internal sphincter will be passively compressed and the rectum will expand reflexively, and the feces will "backward" to the rectum, and the desire to defecate will gradually disappear.

What does a normal stool look like?

shape

The shape is soft and non-sticky, showing a strip of soft stool. In the urinal, it can float on the water surface without sticking, and it can be cleaned when flushed.

frequency and habit

The habit and frequency of defecation vary from person to person. Getting up early to defecate once a day is the best state. If there is no difficulty in defecation or other discomfort, defecation once every 1 to 3 days is not considered constipation, and defecating no more than 3 times a day is not considered diarrhea. .

What's the matter with the stool "hard at the front and soft and sticky at the back"? Doctor: It may be related to 3 reasons

get angry

Stool stays in the intestinal tract for a long time, and the anger will easily cause the body to lack water. This problem will easily lead to dry stool. If the newly formed stool water has not been evaporated in time, it will easily cause the front to be dry and hard, and the back will be soft and sticky There was a problem.

If such a situation occurs, you can drink more chrysanthemum tea appropriately in your daily life, so as to achieve the effects of clearing liver fire, dispersing wind heat, clearing heat and detoxification, etc., and can help improve the phenomenon that the stool becomes soft and sticky after being hardened before the stool , and can also improve dry mouth and bad breath caused by anger.

intestinal polyps

At the beginning of defecation, the stool is dry, and then the stool begins to become soft. This problem should also be suspected to be caused by intestinal polyps.

Intestinal polyps It is particularly important to judge the nature, size and degree of harm of polyps in time . Since the continuous development of adenomatous polyps will easily lead to the appearance of cancer cells , it is more likely to induce Chang'an phenomenon at this time.

If intestinal polyps are not treated early, as the disease progresses , patients will be prone to problems such as diarrhea and constipation, and sometimes blood in the stool.

When the intestinal polyps reach a certain volume, the intestinal lumen will become narrow easily, and the feces may be hard at the beginning of defecation, which is difficult to pass smoothly. The problem of not getting out, so the stool in the back will also be soft.

cold spleen

Hard before stool and then soft may also be due to the lack of fluid in the body and problems caused by malnutrition.

If the accumulation of water in the body cannot be metabolized normally, it will be easily converted into water dampness, which is one of the reasons for spleen deficiency.

The soft and sticky back of the stool is caused by the deficiency and coldness of the spleen, which cannot be recuperated. If a large amount of water flows to the large intestine, it will not easily cause the problem of loose stools.