Sitting in the toilet for a considerable amount of time can also cause hemorrhoids. The sitting position during bowel evacuation is stressful to the veins in the anal canal. Unnecessarily sitting on the toilet bowl even when there is no sign of bowel movement is strenuous to the veins in the lower rectal area. This habit of sitting on the toilet for substantial amount of time paves way for hemorrhoid formation. Also, in today's corporate world, employees tend to sit on their desk for long periods of time. In other words, people in jobs that require long sitting hours may also fall prey to hemorrhoids.