How do hemorrhoids form? What are the causes of hemorrhoids?

Hemorrhoids are anorectal diseases that can cause great harm, affect the patient's activities, cause serious symptoms such as bloody stools, and prevent sleep at night. Therefore, you should pay attention to understanding the causes and pay attention to the prevention of hemorrhoids. So what are the causes of hemorrhoids?

1. Anatomical reasons: Regular sitting for long periods of time without exercise will cause serious harm over time. When a person is standing or sitting, the anus and rectum are located at the lower part. Due to gravity and the pressure of internal organs, the upward venous return is greatly hindered. The rectal veins and their branches lack venous valves, so blood cannot flow back easily and is prone to congestion. Its blood vessels are arranged in a special way and pass through the muscular layer at different heights, which makes them easily compressed by fecal matter, affecting blood return. The veins pass through the loose tissue of the submucosal layer and lack stent fixation around them, making them prone to expansion and buckling.

2. Genetic relationship: many patients are physically weak, which is caused by congenital factors. The venous walls are congenitally weak and have reduced resistance, and cannot withstand the pressure within the blood vessels, so they gradually expand.

3. Occupational factors will cause certain inducements, and you should pay attention to understand these inducements. Standing or sitting for a long time, or carrying heavy loads for a long time while walking long distances, will affect venous return, slow down blood flow in the pelvis and cause congestion of abdominal organs, leading to excessive filling of hemorrhoidal veins, decreased tension of venous walls, and easy dilation of blood vessels due to congestion. Insufficient exercise, reduced intestinal motility, slow downward movement of feces, or habitual constipation can compress and stimulate the veins, causing local congestion and blood reflux obstruction, resulting in increased pressure in the hemorrhoidal veins and reduced resistance of the venous wall.

4. Local irritation and improper diet: Exposure to cold or heat in the anus, constipation, diarrhea, excessive drinking and eating spicy food can all irritate the anus and rectum, causing congestion of the hemorrhoidal venous plexus, affecting venous blood return and resulting in a decrease in the resistance of the venous wall.

5. Increased anal venous pressure: Cirrhosis, liver congestion and incomplete compensation of cardiac function can cause anal vein congestion and increased pressure, affecting rectal venous blood return.