A hemorrhoid is a swollen vein in the lower rectum or around the anus, and its look ranges from a small skin-colored bump to a dark purple grape-sized lump depending on type and severity. External hemorrhoids appear under the skin around the anal opening, often as round, bluish-purple swellings the size of a pea.
Internal hemorrhoids usually remain hidden inside the rectal lining until they prolapse, at which point moist pink or reddish tissue pushes through the anus.
The sections below walk through how each type looks, how it differs from similar conditions like skin tags and fissures, and when the appearance signals it’s time to see a specialist.
Understanding Hemorrhoids and Where They Form
Hemorrhoids are cushions of swollen veins located in two distinct zones: inside the rectum and under the skin surrounding the anus. Both types develop when pressure builds in the lower rectum and pushes blood against fragile vein walls, causing them to stretch, bulge, and sometimes bleed.
Several everyday pressures drive that swelling. Straining during bowel movements ranks at the top, especially when stool is hard and difficult to pass. Chronic constipation, pregnancy, and heavy lifting all increase downward pressure on the pelvic veins. Prolonged sitting, particularly on the toilet, contributes because gravity keeps blood pooling in the rectal area. None of these triggers alone guarantees hemorrhoids, but they share a common mechanism: sustained pressure that prevents blood from draining normally.
Why Location Changes the Appearance
The zone where a hemorrhoid forms determines nearly everything about how it looks and feels. Internal hemorrhoids sit above the dentate line, a boundary inside the rectum where there are few pain nerves. That positioning means they often produce no visible bump at all, only painless rectal bleeding on toilet paper or in the bowl. External hemorrhoids sit below that boundary, where pain-sensitive nerves are abundant, so even a small swelling becomes noticeable and tender right away.
Severity also spans a wide visual range. A mild external hemorrhoid may feel like a tiny bump no larger than a lentil, while a fully prolapsed internal hemorrhoid can protrude as a moist, thumb-sized bulge. The National Institutes of Health notes that hemorrhoids vary in size from a small pea to a grape-sized lump depending on how much the vein wall has stretched. Recognizing that range helps you set realistic expectations before you look.
Visual Signs of External Hemorrhoids
External hemorrhoids are the type most people actually see, because they form right at the anal opening. They typically appear as small, round bumps under the skin, ranging from the size of a pea to something closer to a grape.
Color and Shape Clues
When mild, an external hemorrhoid is often skin-toned or slightly pink, blending with the surrounding tissue. As blood pools inside the stretched vein, the color shifts toward bluish or dark purple. The shape stays rounded and well-defined, sitting just beneath the surface rather than spreading outward.
Texture and Tenderness
To the touch, external hemorrhoids feel smooth or slightly rubbery. They can be tender when sitting or wiping, especially if irritated by friction. Swelling can change the appearance overnight, particularly after a long day of sitting or a straining episode. A small surface blood clot can transform a barely visible bump into a firm, dark lump within 24 to 48 hours, which is the hallmark of a thrombosed hemorrhoid.
A hemorrhoid that grows noticeably larger or darker over a day or two is signaling that pressure inside the vein has spiked, not that something else is wrong.
Internal Hemorrhoids and What a Prolapse Looks Like
Most internal hemorrhoids stay hidden inside the rectal lining, which is why early signs of hemorrhoids often begin with painless bleeding rather than a visible lump. Because they sit above the dentate line where pain nerves are scarce, they can grow quietly until something forces them outward.
What a Prolapsed Internal Hemorrhoid Looks Like
When an internal hemorrhoid prolapses, it appears as a moist, pink or reddish bulge that pushes through the anus during straining. The tissue looks wet and shiny rather than dry and skin-covered, which is one of the clearest visual differences from an external hemorrhoid. In mild cases, the bulge retracts on its own once straining stops. In more advanced cases, it remains outside the body and may need to be gently pushed back inside with clean fingers.
Grading Prolapse by Severity
| Grade | How Far It Protrudes | What You See and Feel |
|---|---|---|
| I | No protrusion | Bulging vein inside the rectum; no visible lump, possible bleeding |
| II | Protrudes during straining, retracts on its own | Brief bulge that slips back after the bowel movement |
| III | Protrudes and stays out, requires manual pushing | Moist pink lump visible at the anal opening until repositioned |
| IV | Cannot be pushed back inside | Persistent protrusion, often larger and more uncomfortable |
Higher grades don’t always mean more bleeding, but they do change how the tissue looks. A grade IV prolapse tends to appear larger, more swollen, and sometimes irritated from constant exposure.
Because prolapsed tissue sits outside the body, changes in blood flow can turn that swelling darker almost overnight.
Thrombosed Hemorrhoids and Sudden Color Changes
A thrombosed hemorrhoid forms when blood clots inside the vein, trapping it under the skin and creating a hard, firm lump that looks dark blue, purple, or nearly black. The clot stretches the vein wall, which is what drives both the color shift and the sharp tenderness.
Recognizing the Warning Signs
Sharp, localized pain is usually the first clue. Sitting, walking, or wiping becomes noticeably uncomfortable compared with a typical external hemorrhoid, where discomfort stays mild. The surrounding skin often swells, and the surface may look stretched and shiny as pressure builds underneath. A rapid color change within 24 to 48 hours, from pink or red to deep purple, is the key visual signal that a clot has formed.
Thrombosed hemorrhoids look alarming, but they are not dangerous. The clot is local, and the swelling typically begins to improve within a few days even without medical treatment.
Why Speed Matters
A thrombosed hemorrhoid reaches peak pain within about 48 hours. After that window, the clot begins to dissolve on its own, and tenderness gradually fades over one to two weeks. Some people seek care during that peak window because a clinician can remove the clot and shorten the painful phase, though conservative care at home also helps most cases resolve.
That rapid darkening is what separates a thrombosed clot from other color shifts, making it worth comparing against nearby conditions.
Telling Hemorrhoids Apart From Skin Tags, Fissures, and Prolapse
Several common conditions show up in the same area and are easily confused with hemorrhoids. A quick visual comparison helps match what you see to the most likely cause before deciding whether to seek care.
Quick Visual Comparison
| Condition | Shape | Color | Texture | Pain Pattern |
|---|---|---|---|---|
| External hemorrhoid | Round, raised bump | Pink to bluish-purple | Smooth, rubbery | Tender with pressure |
| Prolapsed internal hemorrhoid | Bulging, moist mass | Pink or red | Wet, shiny | Aching, worsens with sitting |
| Anal skin tag | Flat, soft flap | Matches surrounding skin | Loose, non-tender | Usually none |
| Anal fissure | Thin, linear tear | Red streak at the opening | Sharp-edged | Intense pain during bowel movements |
| Rectal prolapse | Ring-shaped protrusion | Red or pink lining | Larger, concentric folds | Pressure, possible incontinence |
Skin tags are the easiest to rule out visually because they look like flat, soft flaps of excess skin rather than rounded, raised veins, and they rarely change color. Fissures are linear tears that cause sharp pain during bowel movements rather than producing a noticeable lump. Rectal prolapse involves a much larger, ring-shaped protrusion of rectal lining, distinct from a single hemorrhoid bulge.
When the Appearance Warrants a Doctor’s Evaluation
Most hemorrhoids are not dangerous and improve with simple at-home care, but certain visual changes signal that a professional evaluation is worthwhile. Persistent bleeding, rapid hardening, or an irreducible bulge are the visual cues most worth acting on.
Red-Flag Appearance Changes
- Persistent bleeding: More than a few drops on toilet paper, or blood mixed into the stool itself, deserves a specialist look.
- Rapid hardening: A soft bump that turns firm and dark within a day or two suggests a clot and may need prompt attention.
- Irreducible prolapse: A bulge that stays outside the body and cannot be gently pushed back signals a more advanced stage.
- Color that does not improve: Dark purple tissue that remains unchanged after two to three weeks of conservative care.
- Accompanying symptoms: Fever, significant pain, dizziness, or a shift in bowel habits beyond typical hemorrhoid discomfort.
- Any lump that keeps growing: A bulge that increases in size over several days rather than shrinking.
Typical At-Home Care for Mild Cases
Conservative care resolves most mild hemorrhoids within a few weeks. Warm sitz baths for 15 minutes, two or three times a day, relax the sphincter and ease swelling. Increasing dietary fiber and water intake softens stool and reduces straining, which addresses one of the root causes. Topical creams marketed for hemorrhoid relief, such as wipes and ointments available without a prescription, may soothe surface irritation but do not shrink the vein itself.
If creams only mask the surface, the real question becomes which warning signs mean a clinician should take a closer look.
Stay alert to changes in color, size, or pain level over the first week of home care. If any of those worsen instead of improve, that’s the signal to book an evaluation with a colon and rectal specialist rather than waiting longer.
The Bottom Line
The clearest visual signal of a hemorrhoid is a round, raised bump near the anus that ranges from pink to dark purple depending on whether blood is pooling inside the vein. Internal hemorrhoids typically stay hidden until they prolapse, at which point moist pink tissue bulges outward. Thrombosed hemorrhoids stand out because they harden and darken within a day or two.
When in doubt, especially with persistent bleeding or a lump that won’t retract, a visit to a colon and rectal specialist gives you a clear answer and rules out anything more serious.
FAQ
What do hemorrhoids look like on the outside?
Small, round bumps beneath the skin surrounding the anus are a common sign of external hemorrhoids. They range from skin-toned or pink when mild to bluish or dark purple as blood pools inside the stretched vein, and they typically appear the size of a pea to a grape.
How can I tell if I have a hemorrhoid or something else?
Hemorrhoids appear as raised, rounded bumps that may change color, while skin tags are flat flaps of skin, fissures are thin linear tears, and rectal prolapse forms a larger ring-shaped protrusion. Pain pattern and color shift are the two fastest ways to narrow it down.
Do hemorrhoids go away on their own?
Most mild external hemorrhoids shrink within one to two weeks with warm sitz baths, more fiber, and reduced straining. Internal hemorrhoids can also regress, though a prolapsed one may need to be gently pushed back inside and watched.
When should I see a doctor for hemorrhoids?
Schedule an evaluation for persistent bleeding, a lump that hardens quickly, a prolapse that cannot be pushed back inside, or any bulge that keeps growing in size. Fever, severe pain, or changes in bowel habits also warrant prompt attention.
What does a thrombosed hemorrhoid look like?
A hard, dark blue, purple, or nearly black lump typically develops within 24 to 48 hours when a hemorrhoid becomes thrombosed. The surface often looks stretched and shiny, and the area is sharply tender to the touch.
Are hemorrhoids visible?
Bumps near the anal opening mark the presence of external hemorrhoids, whereas internal ones often stay hidden until prolapse reveals moist, pink, bulging tissue.
