The blood vessels around the anus & in the rectum will stretch under pressure and may swell or bulge. Inflamed veins (hemorrhoids) can develop when pressure increases in the lower rectum. This may be due to:

. Chronic constipation

. Sitting on the toilet for too long

. Straining when passing a stool

. are born with a weakness in your rectum or have a family history of piles heredity

. eat a low-fiber diet

. Obesity/overweight

. Lifting heavy weights regularly

. Pregnancy

. Chronic diarrhea

. Prostate problems in older men

. Anal intercourse

. Mental tension