The veins around your anus tend to stretch under pressure and may bulge or swell. Swollen veins (hemorrhoids) can develop from an increase in pressure in the lower rectum. Factors that might cause increased pressure include:

  • Straining during bowel movements
  • Sitting for long periods of time on the toilet
  • Chronic diarrhea or constipation
  • Obesity
  • Pregnancy
  • Anal intercourse
  • Low-fiber diet

Hemorrhoids are more likely as you get older because the tissues that support the veins in your rectum and anus can weaken and stretch with aging.

Jun. 19, 2013