Hemorrhoids are swollen veins in the anal canal. It is a common problem, which while painful is not usually serious. Internal hemorrhoids are veins swollen within the canal; external hemorrhoids swell near the opening of the anus. Often patients have both internal and external hemorrhoids. Often people misspell this conditions as hemroids and hemeroids while searching for natural hemorrhoid treatment. Causes of Hemorrhoids Excess pressure on the veins in the pelvic, rectal and anal canals causes hemorrhoids.