Internal hemorrhoids are usually painless, which is exactly what makes them tricky to identify on your own. Unlike external hemorrhoids that you can see and feel, internal hemorrhoids sit inside the rectum where there are fewer pain-sensing nerves. The most common first sign is bright red blood on toilet paper or in the toilet bowl after a bowel movement, with little or no pain at all.
Why Internal Hemorrhoids Don’t Hurt
Internal hemorrhoids form above a boundary inside the anal canal where the tissue transitions from one type to another. The tissue above this line has a different nerve supply than the skin around the outside of your anus. That’s why internal hemorrhoids rarely cause the sharp, throbbing pain people associate with hemorrhoid problems. If you’re experiencing significant pain around your anus, the cause is more likely an external hemorrhoid, a blood clot within a hemorrhoid, or a small tear in the anal lining called a fissure.
This lack of pain means many people have internal hemorrhoids without knowing it. Prevalence estimates range widely, from 3 to 30 percent of the population, partly because so many cases go unreported.
The Signs You’re Most Likely to Notice
Painless rectal bleeding is the hallmark symptom. You might see small amounts of bright red blood on toilet tissue, dripping into the bowl, or coating the surface of your stool. The blood is bright red because it’s fresh, coming from just inside the rectum rather than higher up in the digestive tract.
Other signs depend on the size of the hemorrhoid. Smaller ones may bleed occasionally and cause no other symptoms. Larger internal hemorrhoids can produce a feeling of fullness or pressure in the rectum, mucus discharge that irritates the surrounding skin, and itching around the anus. Some people describe the sensation of something not being fully “empty” after a bowel movement.
What Prolapse Looks and Feels Like
As internal hemorrhoids enlarge, they can begin to push through the anal opening during a bowel movement. This is called prolapse, and it’s graded on a four-point scale based on severity:
- Grade 1: The hemorrhoid stays inside the rectum. You won’t see or feel it, but it may bleed.
- Grade 2: It pushes out during a bowel movement but slides back in on its own afterward.
- Grade 3: It pushes out and stays out until you manually push it back in.
- Grade 4: It stays outside permanently and cannot be pushed back in.
A prolapsed hemorrhoid looks like a soft, pinkish-red lump protruding from the anus. At this stage, you may start to feel pain, discomfort when sitting, and difficulty with bowel movements. Grade 3 and 4 hemorrhoids carry additional risks: the blood supply to the protruding tissue can get cut off (strangulation), or a blood clot can form inside it. Both of these situations cause sudden, intense pain and need prompt medical attention. Chronic bleeding from prolapsed hemorrhoids can also lead to anemia over time.
How Internal Hemorrhoids Are Diagnosed
You can’t see internal hemorrhoids yourself, and neither can a doctor without looking inside. A standard physical exam typically starts with a digital rectal exam, where a gloved finger checks for tenderness, lumps, and masses. But confirming internal hemorrhoids usually requires a direct look at the tissue.
The most common tool is an anoscope, a short, hollow tube inserted a few inches into the anal canal. The procedure takes just a few minutes, happens in a regular office visit, and doesn’t require anesthesia. If the doctor needs to see a bit higher up, a proctoscope (a slightly longer instrument) can examine the rectum and lower colon. Internal hemorrhoids are also frequently discovered incidentally during colonoscopies performed for other reasons, like routine colorectal screening.
Hemorrhoid Bleeding vs. Something More Serious
Here’s the important thing about rectal bleeding: hemorrhoids are the most common cause, but they aren’t the only one. Colorectal cancer, polyps, inflammatory bowel disease, and other conditions can also produce blood in the stool. Knowing what sets hemorrhoid bleeding apart can help you gauge your situation.
Hemorrhoid bleeding is typically bright red, painless, episodic (it comes and goes), and improves with basic care like increasing fiber and staying hydrated. Bleeding from colorectal cancer tends to be more persistent, and the blood is often darker in color because it originates higher in the colon. Colon cancer also causes symptoms that hemorrhoids generally do not: unexplained weight loss, persistent changes in bowel habits, abdominal cramping, a feeling that the bowel doesn’t empty completely, and unusual fatigue. Colon cancer is more common in people over 50, while hemorrhoids frequently affect younger adults.
Rectal bleeding that lasts more than a day or two warrants a doctor’s visit. If bleeding is heavy, continuous, or accompanied by severe abdominal pain, go to an emergency room. And if you notice signs of significant blood loss (dizziness when standing, rapid shallow breathing, confusion, cold or clammy skin, or fainting), call emergency services.
What Triggers Internal Hemorrhoids
Internal hemorrhoids develop when the cushions of tissue lining the anal canal swell with excess blood. The most common triggers are straining during bowel movements, chronic constipation or diarrhea, sitting on the toilet for extended periods, and a low-fiber diet. Pregnancy increases the risk due to added pressure on pelvic veins. Aging plays a role too, as the supportive tissue in the anal canal weakens over time.
If you’re noticing occasional bright red blood and have no other symptoms, internal hemorrhoids are a likely explanation, especially if you’ve been constipated or straining recently. But because internal hemorrhoids can’t be seen from the outside and rectal bleeding overlaps with other conditions, getting a proper exam is the only way to confirm what’s going on. The diagnostic procedures are quick, don’t require special preparation in most cases, and give you a clear answer.