(HealthDay News) -- Hemorrhoids occur when blood vessels in the rectum become swollen and tender.
The American Society of Colon and Rectal Surgeons says common risk factors for hemorrhoids include:
Having chronic constipation or diarrhea, or pushing too hard during bowel movements.
Having family members who have had hemorrhoids.
Sitting on the toilet for long periods.
Overusing enemas or laxatives, which can trigger problems with bowel function.