Hemorrhoids themselves are not a disease. They are normal cushions of blood vessels, smooth muscle, and connective tissue that everyone has inside the anal canal. These structures contribute about 15 to 20 percent of the resting pressure that keeps the anus closed and help you distinguish between solid, liquid, and gas. The condition people typically call “hemorrhoids” is more precisely known as hemorrhoidal disease, which occurs when those cushions become swollen, displaced, or start bleeding. Roughly 26 percent of adults worldwide have hemorrhoids at any given time, and by age 50, about half of adults have experienced symptoms.
Normal Anatomy vs. Hemorrhoidal Disease
The confusion starts with language. The word “hemorrhoids” refers to both the anatomical structures and the problems they cause. Every person has hemorrhoidal cushions unless they’ve been surgically removed. These cushions are clusters of tiny arteries, veins, and the connections between them, all wrapped in connective tissue and lined by the normal inner surface of the anal canal. They are not varicose veins, despite how often that comparison gets made.
Hemorrhoidal disease is what happens when those cushions swell, slide out of position, or bleed. The bleeding, notably, is arterial rather than venous, which is why the blood is bright red. The shift from normal anatomy to a symptomatic condition is driven by increased pressure, weakening of the connective tissue that holds the cushions in place, or both. So while hemorrhoids are part of your body’s standard equipment, hemorrhoidal disease is a recognized medical condition that can range from mildly annoying to seriously painful.
What Causes Them to Become Symptomatic
Anything that increases pressure in the pelvic area and lower digestive tract can push hemorrhoidal cushions toward becoming a problem. The most common triggers include:
- Chronic constipation or straining during bowel movements. Repeated downward pressure stretches the supportive tissue and engorges the cushions with blood.
- Pregnancy. The added weight of a growing uterus presses on pelvic veins, while increased blood volume makes veins work harder. Hormonal changes also slow digestion, making constipation more likely.
- Prolonged sitting, especially on the toilet, which keeps pressure concentrated on the anal cushions.
- Heavy lifting or intense physical exertion that spikes intra-abdominal pressure.
- Aging. The connective tissue anchoring the cushions weakens over time, which is why hemorrhoid patients tend to be older on average.
These factors don’t guarantee hemorrhoidal disease, but they make the cushions more vulnerable to displacement and swelling.
Internal vs. External Hemorrhoids
Where the problem occurs inside the anal canal determines the type and, importantly, how much it hurts. The dividing line is a ring of tissue called the dentate line, about two centimeters inside the anus.
Internal hemorrhoids sit above that line. The tissue covering them has no pain-sensing nerves, so they typically cause painless bleeding, often noticed as bright red streaks on toilet paper or in the bowl. As they progress, they can prolapse, meaning they bulge out of the anal opening. Doctors grade them on a four-point scale: Grade I hemorrhoids bleed but stay inside. Grade II prolapse during a bowel movement but slide back in on their own. Grade III protrude and need to be pushed back in manually. Grade IV are permanently prolapsed or contain a blood clot. A prolapsed internal hemorrhoid feels soft and smooth, almost rubbery.
External hemorrhoids sit below the dentate line and are covered by regular skin loaded with pain-sensing nerves. When a blood clot forms inside one (a thrombosed hemorrhoid), it creates a firm, bluish lump just outside the anus. The pain is constant and can be severe, unlike the typically painless bleeding of internal hemorrhoids.
How Hemorrhoidal Disease Is Managed
Most cases resolve or improve significantly with changes you can make at home. Increasing fiber intake (through food or a supplement) softens stool and reduces straining. Drinking more water, avoiding prolonged sitting on the toilet, and using a warm sitz bath for 10 to 15 minutes a few times a day all help relieve swelling and discomfort. Over-the-counter creams and suppositories can ease itching and pain in the short term.
When home measures aren’t enough, office-based procedures are the next step for internal hemorrhoids. The most common is rubber band ligation, where a small band is placed at the base of the hemorrhoid to cut off its blood supply. It’s quick, doesn’t require anesthesia, and works well for Grade I through III hemorrhoids. At two years after the procedure, about 15.5 percent of patients see symptoms return. Of those who do recur, roughly two-thirds get another banding and one-third proceed to surgery.
Surgical removal is reserved for the most severe cases: large Grade III, Grade IV, or thrombosed external hemorrhoids that don’t respond to other treatments. Recovery from surgery takes longer and involves more discomfort, but recurrence rates are lower than with office procedures.
When Symptoms Point to Something Else
Rectal bleeding is the hallmark of hemorrhoidal disease, but it’s also a symptom of more serious conditions, including colorectal and anal cancer. A few features help distinguish the two. Hemorrhoidal tissue that prolapses feels soft and smooth. A lump that feels hard, irregular, rough, or coarse warrants closer attention. Other warning signs that suggest something beyond hemorrhoids include swollen lymph nodes in the groin, unexplained changes in bowel habits, and anal discharge.
A practical rule: if symptoms last more than two weeks, get worse over time, or resolve and then quickly return, further evaluation is appropriate. This is especially true for anyone over 45 or with a family history of colorectal cancer, since age-appropriate screening can catch problems that hemorrhoid symptoms might otherwise mask.