You’re lifting heavy objects
You may think it’s harmless to pick up one end of the couch while you’re moving. But it could cause you to bear down too hard. That increases pressure in the rectum, causing the veins (called the hemorrhoidal plexus) to swell like a balloon, says Darren Brenner, MD, associate professor of medicine at Northwestern University Feinberg School of Medicine and a gastroenterologist at Northwestern Medical Group in Chicago. Boom: hemorrhoids.