Hemorrhoids at 20x Magnification
Hemorrhoids generally form due to excessive pressure in the rectal area, which causes the walls of nearby veins to distend as the result of an increased influx of blood. This increase in pressure may occur due to a variety of activities, such as straining during bowel movements, lifting heavy objects, sitting for extensive periods of time, and severe coughing. Also, pregnant women often experience hemorrhoids due to the intra-abdominal pressure caused by the presence of the growing fetus, and individuals suffering from chronic liver disease or tumors may experience them as a complication of their more serious condition. In many cases, hemorrhoids will clear up on their own over time, but once the veins have been stretched, it is subsequently easier for hemorrhoids to flare up again, so that many people experience the condition repeatedly.