Anatomy and the Goligher Grading System

To understand why hemorrhoids cause certain symptoms and how doctors decide on a treatment plan, it helps to understand the anatomy of the anal canal. The way your hemorrhoids behave—whether they bleed without pain or cause significant discomfort—is largely dictated by their location relative to a specific internal boundary called the dentate line.

The Dentate Line: A Sensory Boundary

The dentate line (also known as the pectinate line) is a zig-zag border about two centimeters inside the anal canal ^[1]. It acts as a major dividing line for anatomy and sensation:

• Above the Dentate Line: The tissue is lined with mucosa, which is similar to the lining of your intestines. It is less sensitive to sharp, somatic pain, meaning you generally cannot feel cutting or burning in this area, though it can still produce pressure or visceral discomfort ^[1][2]. This is where internal hemorrhoids originate.
• Below the Dentate Line: The tissue is covered by anoderm, a specialized type of skin. Unlike the tissue above, the anoderm is densely packed with somatic pain receptors ^[1][3]. This is where external hemorrhoids originate.

Because of this sensory difference, external hemorrhoids are often associated with pain and tenderness, while internal hemorrhoids are typically painless unless they become severely trapped, prolapsed, or complicated by other issues ^[4].

Classifying Internal Hemorrhoids: The Goligher Scale

Doctors use the Goligher grading system to classify the severity of internal hemorrhoids. This system focuses on prolapse—the degree to which the hemorrhoidal tissue slides down and out of the anal canal ^[1][5]. Note that grading describes prolapse only; bleeding, pain, and patient preference also heavily influence treatment decisions.

This grading is a primary tool for choosing treatment. Lower grades (I and II) are often managed with lifestyle changes or office-based procedures, while higher grades (III and IV) may require more intensive interventions or surgical discussion ^[1][6].

External and Mixed Hemorrhoidal Disease

While the Goligher scale is specific to internal hemorrhoids, many people experience symptoms from the external area as well.

External Hemorrhoids

These are swellings of the veins located under the skin (anoderm) around the anus. Because this skin is so sensitive, external hemorrhoids can cause significant itching, swelling, and pain ^[3]. If a blood clot forms inside one (thrombosis), it can create a hard, painful, bluish lump that often requires prompt medical assessment for pain relief ^[1].

Mixed Hemorrhoidal Disease

It is very common for patients to have both internal and external components at the same time. This is known as mixed hemorrhoidal disease ^[3]. In these cases, the hemorrhoidal cushions both above and below the dentate line are enlarged and may be connected ^[2].

Patients with mixed disease may experience painless, bright red bleeding typical of internal hemorrhoids, alongside the physical lumps, hygiene challenges, and potential for pain associated with external hemorrhoids ^[1]. When planning treatment for mixed disease, your doctor must address both components to ensure long-term relief.

Why Accuracy Matters

While the Goligher scale is the gold standard for communication between doctors, research shows that different clinicians may sometimes assign slightly different grades to the same patient ^[7]. This is why a thorough physical examination—including a visual inspection, a digital rectal exam, and an anoscopy (using a small, lighted tube to see the internal canal)—is crucial ^[1][8]. Seeing the tissue in person allows your doctor to determine if the “lump” you feel is a Grade III internal hemorrhoid that can be tucked back in, or a permanent external skin tag that requires a different approach.