What Are Internal Hemorrhoids?

Internal hemorrhoids are swollen blood vessels inside your lower rectum. They develop when pressure builds up in the veins of that area, causing them to enlarge and become irritated. Unlike external hemorrhoids, which form under the skin around your anus and are visible, internal hemorrhoids are located deep inside your rectum, where you cannot see them directly.

Many people with internal hemorrhoids don’t realize they have them because they may cause no symptoms at all. When symptoms do appear, they can include bright red bleeding, itching, or a sensation of pressure. The challenge is that these symptoms alone cannot tell you how severe your hemorrhoids are or whether they need treatment.

Signs You Might Have Internal Hemorrhoids

If you’re experiencing these symptoms below, internal hemorrhoids could be the cause. But remember: these same symptoms can come from other conditions, so professional evaluation is important for accurate diagnosis.

Bright Red Bleeding

One of the most recognizable signs is bright red blood. You might notice it on toilet paper after wiping, in the toilet bowl, or occasionally in your stool. This bleeding can happen when you strain during a bowel movement or when hemorrhoidal tissue becomes irritated.

Important: While bright red bleeding suggests hemorrhoids, rectal bleeding also occurs with colon polyps, anal fissures, inflammatory bowel disease, and colorectal cancer. Never assume bleeding is from hemorrhoids without professional evaluation.

Anal Itching or Irritation

Many people with internal hemorrhoids experience itching in the anal area. This can happen because enlarged hemorrhoids produce mucus that irritates the surrounding skin. The itching may get worse at night or after bowel movements.

Feeling of Fullness or Pressure

Some patients report a sensation of fullness, pressure, or incompleteness after having a bowel movement, even though they’ve gone to the bathroom. This feeling may suggest internal hemorrhoids but can also indicate other rectal conditions.

Mucus Discharge

Enlarged internal hemorrhoids can leak mucus, which sometimes causes discomfort or moisture around the anus. This mucus discharge is a real symptom but isn’t unique to hemorrhoids and can have other causes.

What You Can See vs. What You Can’t

Understanding the difference between what you can observe and what requires professional examination helps explain why self-diagnosis is unreliable for internal hemorrhoids.

External Hemorrhoids (Visible)

External hemorrhoids develop under the skin around your anus and are technically visible or palpable if they’re present. You might notice a small lump, swelling, or feel tenderness when wiping or sitting. External hemorrhoids are easier to self-identify because you can actually see or feel them. However, even with external hemorrhoids, professional evaluation helps determine severity and whether treatment is needed.

Internal Hemorrhoids (Invisible)

Here’s the fundamental limitation: internal hemorrhoids are inside your rectum, where you cannot see them. You can observe symptoms they cause (bleeding, itching, pressure), but you cannot see the hemorrhoids themselves. Even if symptoms seem minor or significant, they don’t reliably tell you whether a hemorrhoid is small or big. This means you cannot assess:

• Size — whether they’re small, moderate, or large
• Prolapse status — whether they’re protruding
• Severity grade — doctors use a 4-grade classification system
• Treatment appropriateness — whether they require professional intervention

When Prolapsed Hemorrhoids Might Show Symptoms

The one exception: if an internal hemorrhoid prolapses (stretches and pushes through the anal opening), you might feel it or see it. Prolapsed hemorrhoids may feel like tissue protruding outside your anus. Even in this case, you cannot determine how severe the prolapse is or what treatment is best without professional examination.

Limitations of Self-Checking for Hemorrhoids

Why Internal Hemorrhoids Are Difficult to Self-Diagnose

Professional doctors use specialized instruments like anoscopes (lighted tubes inserted into the anal canal) to see internal hemorrhoids directly. These tools let doctors assess size, location, and severity. At home, you cannot replicate this examination, no matter how carefully you try. The anatomy simply doesn’t allow self-visualization of internal structures.

Severity vs. Symptoms Don’t Always Match

Here’s a fact that surprises many patients: symptom intensity doesn’t always match hemorrhoid size. A small internal hemorrhoid might bleed noticeably, while a larger one might cause minimal symptoms. Conversely, a small external hemorrhoid that becomes thrombosed (clotted) can be extremely painful despite being relatively small. This means you cannot estimate how serious your hemorrhoids are based on how much they hurt or bleed. Professional grading is necessary.

Other Conditions That Mimic Hemorrhoids

Rectal bleeding, itching, pain, and pressure can come from various conditions including anal fissures (tears in the anal lining), inflammatory bowel disease (Crohn’s disease or ulcerative colitis), intestinal polyps, colorectal cancer, infections or abscesses, and diverticulitis. While hemorrhoids are common, so are these other conditions. Professional evaluation rules out serious diagnoses that self-assessment cannot.

When to Schedule Professional Evaluation

While mild hemorrhoid symptoms may improve with home care, some signs should never be ignored. Scheduling a professional evaluation can help confirm whether hemorrhoids are causing your symptoms, rule out more serious conditions, and determine the most appropriate treatment. You should see a doctor if you experience these red flags:

• Persistent rectal bleeding — bleeding that continues beyond a few days
• Heavy bleeding — or bleeding with multiple bowel movements
• Severe pain — or sudden pain in the anal area
• Worsening symptoms — pain or bleeding that gets worse or changes
• Prolapsing tissue — feeling a lump that won’t go back inside
• Concern about other diagnoses — when you’re unsure what’s causing symptoms

How Long to Wait Before Seeing a Doctor

If you have mild symptoms (slight itching or occasional light bleeding) and suspect hemorrhoids, you can try home remedies like sitz baths, increased fiber, and hydration for about one week. However, if symptoms persist beyond one week, persist despite home care attempts, or are severe, schedule an evaluation. Early diagnosis prevents complications and gives you more treatment options.

What Professional Diagnosis Involves

Professional evaluation is straightforward and quick. Your doctor will:

• Ask about symptoms — discuss when symptoms started and what makes them better or worse
• Review medical history — understand your health background and any relevant conditions
• Perform visual exam — look at your anal area for signs of external hemorrhoids
• Digital rectal exam — gently insert a gloved finger to check for internal abnormalities
• Use anoscope if needed — insert a small lighted tube to visualize internal tissue directly

How USA Hemorrhoid Centers Diagnoses Hemorrhoids

USA Hemorrhoid Centers offers a team of interventional radiologists who specialize in accurate hemorrhoid diagnosis and personalized treatment planning. We use advanced imaging and examination techniques to determine hemorrhoid type (internal or external), severity grade (1-4 scale), whether hemorrhoids are responsive to non-surgical options, and whether you’re a candidate for minimally invasive treatment options like hemorrhoid artery embolization (HAE).

Professional diagnosis is the foundation for effective treatment and lasting symptom relief. With an accurate diagnosis, you’ll understand what you’re dealing with, know whether treatment is appropriate, and be able to make informed decisions about your care.

What Actually Happens When You Clench With Hemorrhoids

Internal hemorrhoids are enlarged vascular cushions located inside the rectum, above a boundary called the dentate line. They receive blood supply through a network of hemorrhoidal arteries and drain through hemorrhoidal veins. When the pressure in that venous network rises, the cushions engorge further.

Clenching the buttocks or the muscles around the anus raises intra-abdominal pressure. This is the same type of pressure that occurs during heavy lifting, straining during a bowel movement, or bearing down. When that pressure increases, blood has a harder time draining out of the hemorrhoidal tissue. The cushions fill with more blood, swell, and can become more irritated, tender, or prone to bleeding.

Research published in PMC confirms that patients with hemorrhoids tend to show higher resting anal pressures compared to those without hemorrhoids, and that elevated pressure is a recognized component of hemorrhoidal disease. Pelvic health clinicians also note that both conscious and unconscious clenching and butt gripping are recognized examples of increased pelvic pressure that can make hemorrhoid symptoms worse.

There are two types of clenching worth understanding:

• Reactive clenching: A short-term tightening in response to pain or discomfort. This is instinctive but may increase pressure at exactly the moment it is least helpful.
• Habitual clenching: Chronic, often unconscious tension held in the pelvic floor muscles throughout the day. This sustained pressure can contribute to ongoing hemorrhoid irritation even outside of bowel movements.

Does Squeezing Make Hemorrhoids Pop Out?

Many people picture squeezing or pushing on a hemorrhoid the way they might deal with a pimple. Internal hemorrhoids do not work that way. They are vascular tissue, not a blocked pore, and they cannot be popped to release contents and resolve.

What can happen with pressure, however, is prolapse. Internal hemorrhoids are graded on a scale from 1 to 4 based on how far they extend through the anal canal:

• Grade 1: Enlarged inside the rectum, no protrusion
• Grade 2: Protrude during a bowel movement, retract on their own
• Grade 3: Protrude with straining or exertion, require manual reduction
• Grade 4: Permanently prolapsed, cannot be reduced manually

Straining and increased intra-abdominal pressure, including from clenching, can encourage grade 2 or grade 3 hemorrhoids to prolapse at moments they otherwise might not. Clenching is not the only factor involved, but it can contribute to the downward sliding of hemorrhoidal tissue, particularly in people whose supporting connective tissue is already weakened or who have more advanced hemorrhoid symptoms.

Squeezing a hemorrhoid directly, or attempting to push it back inside forcefully, is not recommended. It can cause pain, irritate the surrounding tissue, and introduce infection risk in an area naturally exposed to bacteria. If you notice hemorrhoidal tissue protruding and it does not retract on its own, this is a signal to speak with a specialist rather than attempting to manage it manually at home.

Why the Instinct to Clench Feels Right but Doesn’t Help Hemorrhoids

When internal hemorrhoids flare, the area around the anus can feel tender, heavy, or uncomfortable. The body’s instinctive response is to guard the area by tightening the surrounding muscles. This makes sense as a protective reflex, but the anatomy of the pelvic floor means it often creates the opposite of the desired effect.

The pelvic floor is a group of muscles that forms the base of the pelvis and surrounds the rectum and anus. When these muscles are tense or held in a contracted state for extended periods, they constrict the blood vessels running through them. This constriction can slow venous drainage, keep blood pooled in the hemorrhoidal tissue, and sustain or worsen engorgement.

Pelvic health clinicians describe this as a pressure cycle: clenching raises intra-pelvic pressure, pressure impairs venous return, impaired return keeps hemorrhoids engorged, engorgement increases discomfort, and discomfort triggers more clenching. Understanding that this cycle exists is often the first step toward interrupting it.

More on Hemorrhoid Symptoms

What to Do Instead When Hemorrhoids Flare

Rather than clenching when hemorrhoids are uncomfortable, a few behavioral strategies may reduce pressure and help symptoms settle:

• Breathe through it. Deep breathing that expands the lower abdomen, rather than breath-holding or bracing, can reduce pelvic floor tension and lower intra-abdominal pressure.
• Avoid sitting on the toilet for longer than necessary. Prolonged sitting on the toilet creates a mild suction effect and pools blood downward. Go when the urge is clear, complete the movement, and leave.
• Do not strain. If a bowel movement requires significant effort, stool consistency or bowel habits may need addressing. Straining directly increases the pressure that aggravates hemorrhoids.
• Avoid prolonged sitting in general. Extended time in a seated position slows venous return. Short movement breaks can help.
• Do not attempt to push internal hemorrhoids back inside forcefully. If prolapse occurs and tissue does not retract on its own, seek evaluation.

Note: These adjustments may reduce day-to-day symptom aggravation, but they do not address the underlying vascular changes in hemorrhoidal tissue. Losing weight and hemorrhoids are also connected, as maintaining a healthy weight may help reduce pressure on the rectal veins. If symptoms are persistent or worsening, specialist evaluation is the appropriate next step.

When to See a Hemorrhoid Specialist

Behavioral adjustments can help manage hemorrhoid symptoms in the short term. They do not treat the internal hemorrhoids themselves. If any of the following apply, a specialist evaluation is the appropriate next step:

• Rectal bleeding during or after bowel movements, even if painless
• Hemorrhoid tissue protruding that does not retract on its own
• Symptoms that have persisted for more than a few weeks despite conservative care
• Discomfort or pressure that interferes with daily activities, work, or sleep
• Recurring flare-ups that keep returning after settling down

Meet Our Doctors

Can USA Hemorrhoid Centers Help?

At USA Hemorrhoid Centers, evaluation is performed by experienced  interventional radiologists experienced in diagnosing and treating internal hemorrhoids. If symptoms are connected to grade 2 or grade 3 internal hemorrhoids, Hemorrhoid Artery Embolization (HAE) may be an appropriate option.

HAE is a minimally invasive, non-surgical outpatient procedure. A small catheter is inserted through a pinhole access point in the wrist or upper thigh and guided using imaging to the arteries supplying the hemorrhoidal tissue. Tiny particles are delivered to reduce blood flow, which causes the hemorrhoids to shrink over the following weeks. The procedure typically takes 30 to 45 minutes. Most patients return to normal activities the following day. No general anesthesia is required, and studies report clinical success rates of 93% or higher. HAE does not negatively affect anal tone, which distinguishes it from surgical alternatives that carry a risk of fecal incontinence.