cause
1. Anatomical reasons: When people are standing or sitting, the anus and rectum are located in the lower part, and the upward venous return is quite blocked due to gravity and hemorrhoids pressing the organs;
2. Genetic relationship: the vein wall is inherently weak, the resistance is reduced, and it cannot tolerate intravascular pressure, so it gradually expands;
3. Occupational relationship: standing for a long time or sitting for a long time, long-term weight-bearing operation, affecting venous return, making the blood flow in the pelvic cavity slow, visceral congestion, causing excessive filling of hemorrhoid veins, decreasing the tension of venous wall, and blood vessels are prone to congestion and expansion;
4, local stimulation and improper diet: cold, heat, constipation, diarrhea, excessive drinking and eating spicy food in the anus can stimulate the anus and rectum, so that the hemorrhoid venous plexus is congested;
5. Increased anal venous pressure: due to liver cirrhosis, liver congestion and cardiac insufficiency, the anal vein can be congested;
6. Increased intra-abdominal pressure: intra-abdominal tumors, uterine tumors, ovarian tumors, prostate tumors, pregnancy, overeating or squatting for too long can increase intra-abdominal pressure;
7. Anal infection: Hemorrhoid venous plexus is inflamed due to acute and chronic infection, and the elastic tissue of venous wall is gradually weakened due to fibrosis, resulting in varicose veins expanding. Coupled with other reasons, varicose veins gradually increase, resulting in hemorrhoids.
problem analysis
Based on the above reasons, it can be seen that the incidence of hemorrhoids has nothing to do with sheets.