Causes of Hemorrhoids
The veins around the anus tend to stretch under pressure and may bulge or swell. Hemorrhoids can develop from increased pressure in the lower rectum due to:
- Straining during bowel movements.
- Sitting for long periods of time, especially on the toilet.
- Having chronic diarrhea or constipation.
- Being obese.
- Being pregnant.
- Having anal intercourse.
- Eating a low-fiber diet.
- Regularly lifting heavy items.
Risk factors
As people age, the risk of hemorrhoids increases. That’s because the tissues that support the veins in the rectum and anus can weaken and stretch. This also can happen during pregnancy because the baby’s weight puts pressure on the anal region.