A hemorrhoid is a cushion of blood vessels, connective tissue, and smooth muscle that lines your anal canal. Everyone has them. They’re a normal part of your anatomy, helping seal the anal canal shut, protecting the sphincter muscle, and providing the sensory feedback that lets you distinguish between solid stool, liquid, and gas. When people say they “have hemorrhoids,” they mean these cushions have become swollen, inflamed, or pushed out of position, causing symptoms like bleeding, pain, or itching.
How Normal Tissue Becomes a Problem
Hemorrhoidal cushions sit along the anal canal with a rich blood supply. Small ligaments anchor them to the underlying muscle. When everything works normally, you never notice them. Problems start when pressure builds in the area, the blood vessels engorge and stretch, and the supporting tissue weakens or slides downward.
Straining during a bowel movement is one of the most common triggers. It increases pressure inside the anal canal and pushes the cushions against the sphincter muscle. Chronic constipation, prolonged sitting on the toilet, and pregnancy (when the growing uterus compresses the veins in the pelvis) all contribute the same way: they interfere with normal blood flow, causing blood to pool and the vessels to swell. Aging plays a role too, because the connective tissue holding the cushions in place gradually weakens over time. Being overweight adds sustained pressure to the pelvic floor. Interestingly, people with hemorrhoid problems tend to have higher resting muscle tone in the anal canal, meaning the smooth muscle stays tighter than average even when they’re not straining.
Internal vs. External Hemorrhoids
The distinction comes down to location. Internal hemorrhoids form inside the anal canal, above a natural boundary called the dentate line. Because this area has relatively few pain-sensing nerves, internal hemorrhoids usually don’t hurt. The most common sign is painless, bright red blood on toilet paper, in the bowl, or on the surface of your stool. If an internal hemorrhoid swells enough to push through the anal opening (called prolapse), it can cause discomfort and irritation, but you can often push it gently back inside.
External hemorrhoids develop under the skin around the outside of the anus. This area is packed with nerve endings, so external hemorrhoids are more likely to cause pain, especially when you sit. They often feel like hard, tender lumps and can cause itching, irritation, and bleeding when you wipe.
Thrombosed Hemorrhoids
When blood pools inside an external hemorrhoid and forms a clot, it becomes thrombosed. This is a noticeably different experience: sudden, severe pain and a firm lump near the anus that may look blue, black, or purple. The swelling and inflammation are typically much more intense than with a standard hemorrhoid. If you notice one within the first two to three days, a doctor can often remove the clot in the office with significant relief.
The Four Grades of Internal Hemorrhoids
Doctors classify internal hemorrhoids on a scale from Grade 1 to Grade 4 based on how far they’ve moved from their original position:
- Grade 1: Slightly enlarged but still entirely inside the anal canal. You won’t see or feel them. Bleeding may be the only sign.
- Grade 2: These push out of the anus during a bowel movement but slide back in on their own afterward.
- Grade 3: These prolapse during a bowel movement and stay out until you push them back in manually.
- Grade 4: Permanently prolapsed. They remain outside the anus and cannot be pushed back in. Often accompanied by chronic irritation and inflammation.
This grading system matters because it largely determines treatment. Lower grades respond well to conservative measures, while higher grades are more likely to require a procedure.
How Hemorrhoids Are Treated
For most people, the first step is straightforward: increase fiber intake and drink more fluids. This softens stool and reduces straining, which takes pressure off the swollen cushions. Both the American College of Gastroenterology and the American Academy of Family Physicians recommend this as the standard first-line approach. Many mild hemorrhoids improve within a week with fiber, warm baths, and over-the-counter creams or suppositories to reduce discomfort.
When home measures aren’t enough, office-based procedures can treat Grade 1 through Grade 3 internal hemorrhoids. Rubber band ligation is the preferred option: a tiny band is placed around the base of the hemorrhoid, cutting off its blood supply so it shrinks and falls off. Other options include injecting a solution to shrink the tissue (sclerotherapy) or using infrared light to coagulate the blood vessels.
Surgery is generally reserved for Grade 4 hemorrhoids, large Grade 3 hemorrhoids that haven’t responded to banding, or cases involving both internal and external hemorrhoids with prolapse. Traditional surgical removal (hemorrhoidectomy) is the most effective long-term option, though recovery involves more pain. Newer techniques that locate and tie off the arteries feeding the hemorrhoid have shown similar outcomes with potentially less discomfort. People older than 44 are statistically more likely to end up needing surgery, likely because the disease has had more time to progress.
What Else Can Look Like a Hemorrhoid
Rectal bleeding is the hallmark symptom of hemorrhoids, but it’s also a symptom of other conditions that deserve attention. Anal fissures, which are small tears in the lining of the anus, cause bleeding and sharp pain that can feel similar to a hemorrhoid. Colon polyps, diverticulosis, abnormal blood vessels in the colon, and even colorectal cancer can all produce bloody stools or bleeding during bowel movements.
This is why it’s worth getting rectal bleeding evaluated rather than assuming it’s hemorrhoids, particularly if your bowel habits have changed, if your stool looks different in color or consistency, or if the bleeding has been going on for weeks. Chronic low-level bleeding can lead to anemia, sometimes before you even realize how long the problem has been going on. Heavy rectal bleeding accompanied by dizziness or faintness needs immediate medical attention.
How Common They Are
Hemorrhoidal disease affects more than 20% of the population across different age groups, and estimates range as high as 30% depending on the study. Both men and women are affected. The average age at diagnosis in large studies hovers around 45, though hemorrhoids can develop at any point in adulthood. Pregnancy makes them especially common in younger women. Many people with Grade 1 hemorrhoids never realize they have them, so the true prevalence is likely higher than reported numbers suggest.