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Internal hemorrhoids and external hemorrhoids, bleeding hemorrhoids
Hemorrhoids are classified by their point of origin: internal, external, and internal-external.
Internal Hemorrhoids: Internal hemorrhoids originate above the pectinate or dentate line in the anal canal and are covered by a mucous membrane. The internal hemorrhoids become symptomatic when the anal lining and connective tissues become loose and weakened and the vascular system becomes engorged. They are especially at risk for thrombosis, severe pain and bleeding.
External Hemorrhoids: External hemorrhoids are swollen areas of skin and blood vessels around the anus (below the dentate line). They are lined with squamous epithelium that is highly innervated and sensitive. These particular hemorrhoids are also at risk for thrombosis.
Internal-External: When internal and external hemorrhoids occur simultaneously, they are referred to as mixed hemorrhoids
Bleeding hemorrhoids: One of the most common symptoms of hemorrhoids is bleeding from the rectal area before, during and after defecation. The anal mucosa becomes eroded, releasing a bright red blood usually evident to the patient via blood-tinted toilet bowl water, stool or toilet tissue. The blood may result from external or internal hemorrhoids
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