A hemorrhoid is a swollen, enlarged vein in or around the anus and lower rectum. Everyone has small cushions of blood vessels in the anal canal that help with bowel control, but when those cushions stretch, swell, and shift out of place, they become what we call hemorrhoids. About one in four adults has them at any given time, making hemorrhoids one of the most common conditions people search for but rarely talk about.
What Hemorrhoids Actually Are
Your anal canal naturally contains three main cushions of blood vessels, positioned in a ring around the inside of the opening. These cushions have a job: they contain a network of arteries and veins that fill with blood to help seal the canal shut, contributing to continence. A layer of smooth muscle cells controls blood flow in and out of these cushions, almost like a valve.
When pressure builds in the lower rectum repeatedly or for long stretches, those blood vessels stretch and bulge. The supportive tissue around them weakens, and the cushions slide downward from their normal position. That displaced, swollen tissue is a hemorrhoid. It’s not a growth or a tumor. It’s normal anatomy that has been pushed past its limits.
Internal vs. External Hemorrhoids
The difference comes down to location relative to a boundary inside the anal canal called the dentate line.
Internal hemorrhoids sit above the dentate line, inside the rectum where there are few pain-sensing nerves. Their main symptom is painless bleeding, typically bright red blood on toilet paper or in the bowl. As they progress, they can bulge out of the anus (prolapse), causing a feeling of fullness, itching, or mucus leakage. Severe constant pain is rare with internal hemorrhoids unless the tissue becomes trapped outside and loses its blood supply.
Internal hemorrhoids are graded by severity:
- Grade 1: Swollen but stays inside the canal. Bleeding only.
- Grade 2: Bulges out during a bowel movement but slides back in on its own.
- Grade 3: Protrudes and needs to be pushed back in by hand.
- Grade 4: Permanently outside and cannot be pushed back in.
External hemorrhoids form under the skin around the outer edge of the anus, in tissue rich with pain nerves. They tend to feel like a tender lump and can cause itching, swelling, and discomfort when sitting. The most painful complication is a thrombosed external hemorrhoid, where a blood clot forms inside the swollen vein. This shows up as a firm, purple-blue lump that can cause intense, sudden pain. Most thrombosed hemorrhoids resolve on their own within a few weeks, though the first 48 to 72 hours are usually the worst.
Why They Develop
Anything that puts sustained or repeated pressure on the veins of the lower rectum can trigger hemorrhoids. The most common culprits are straining during bowel movements, sitting on the toilet for long stretches, and chronic constipation or diarrhea. A low-fiber diet makes all three more likely because it produces harder, smaller stools that require more effort to pass.
Pregnancy is another major trigger because the growing uterus presses directly on the veins that drain the rectum. Obesity creates a similar kind of chronic abdominal pressure. Regular heavy lifting, which forces you to brace your core and bear down, raises pressure in the same area. Anal intercourse can also contribute.
Age plays a role independent of lifestyle. The connective tissue supporting the anal cushions weakens and stretches over time, which is why hemorrhoids become more common in middle age and beyond.
How They Feel (and What Else It Could Be)
Hemorrhoid symptoms overlap with a few other conditions, so it helps to know the typical pattern. Hemorrhoids generally cause a dull ache, pressure, or throbbing that can last throughout the day. Itching around the anus is very common, often from mucus discharge or irritated skin. Bleeding is bright red and painless with internal hemorrhoids, or accompanied by tenderness with external ones. You might feel or see a soft lump near the anal opening.
Anal fissures, by contrast, cause a sharp, searing pain specifically during and right after a bowel movement, followed by a deep ache that can linger for hours. A fissure is a small tear in the skin, sometimes visible as a crack near the opening. Hemorrhoids can also leave behind a small skin tag after swelling goes down, which is harmless but sometimes confused with a new problem.
Bright red blood on toilet paper is the hallmark hemorrhoid symptom, but rectal bleeding can also signal something more serious. If you notice blood along with unexplained weight loss, a change in your usual bowel habits, iron deficiency, or if you have a family history of colorectal cancer or inflammatory bowel disease, those are signs that need further evaluation, typically with a colonoscopy. For adults over 50, or anyone over 45 who hasn’t been screened, rectal bleeding generally warrants a full evaluation even if hemorrhoids seem like the obvious explanation.
Treatment Options by Severity
Most hemorrhoids, especially grade 1 and grade 2, respond to conservative measures. Increasing your fiber intake softens stools and reduces straining. The recommended target is about 14 grams of fiber per 1,000 calories you eat, which works out to roughly 28 grams per day on a standard diet. If you’re not used to much fiber, increase gradually over a couple of weeks to avoid bloating. Drinking plenty of water, avoiding long sits on the toilet, and not delaying bowel movements all help.
Over-the-counter creams and suppositories can reduce itching and swelling temporarily. Warm sitz baths, where you soak the area in a few inches of warm water for 10 to 15 minutes, can ease discomfort during flare-ups.
When conservative measures aren’t enough, office-based procedures are the next step. The most common is rubber band ligation, where a small band is placed around the base of an internal hemorrhoid to cut off its blood supply. The tissue shrinks and falls off within a week or so. This approach controls bleeding in about 98% of patients and reduces prolapse in roughly 83%. Patient satisfaction rates hover around 94%. Recurrence does happen over time: about 7% of patients see symptoms return within two years, and around 13 to 17% within five years.
Grade 3 and grade 4 hemorrhoids that don’t respond to banding may require surgical removal. Recovery from hemorrhoid surgery typically takes two to four weeks and involves significant discomfort in the first week, but it offers the most durable results for advanced cases.
Keeping Them From Coming Back
Hemorrhoids have a tendency to recur because the underlying anatomy has already been stretched. The most effective long-term strategy is consistently hitting that 28-gram daily fiber target through fruits, vegetables, whole grains, and legumes, or a fiber supplement if needed. Staying physically active helps keep bowel movements regular. Avoid sitting on the toilet longer than necessary, and resist the urge to strain. If you lift weights or do heavy physical labor, focus on breathing technique to avoid bearing down excessively.
During pregnancy, lying on your left side when resting takes pressure off the veins that drain the pelvis. Staying hydrated and using a stool softener if recommended by your provider can prevent the constipation that makes pregnancy-related hemorrhoids worse.