Hemorrhoids are divided into internal hemorrhoids and external hemorrhoids, but both are rectal-anal organism diseases, and their pathogenic factors are not pathogenic infections, and thus are not contagious. Internal hemorrhoids are located in the anal canal above the dentate line, is the soft tissue around the anal canal, that is, the anal cushion hyperplasia and displacement of the formation of the causes, including the anal cushion support structure relaxation, venous plexus tortuous dilatation, arterial anastomotic branch lesions, and so on, and the pathogen has nothing to do with the infection, and thus will not occur infectious. External hemorrhoids are located below the dentate line of the anal canal and are formed by pathological expansion of the submucosal venous plexus of the anal canal and connective tissue hyperplasia, which are also unrelated to pathogen infection and are not contagious. Internal hemorrhoids through the venous plexus anastomosis branch and external hemorrhoids fusion is called mixed hemorrhoids. Whether it is internal or external hemorrhoids are rectal anal canal tissue structure abnormal formation of the swelling, so that even with the hemorrhoids of people sitting on the same stool will not be infectious.