Piles are swollen blood vessels in and around the anus. The medical term is hemorrhoids, and they affect roughly 11% of adults, with a peak between ages 45 and 65. Everyone has these blood vessels as a normal part of their anatomy. They only become “piles” when they swell, stretch, or slip out of place, causing pain, bleeding, or itching.
What Hemorrhoids Actually Are
The tissue lining your anal canal contains clusters of blood vessels called vascular cushions. These cushions have a job: they help your anal sphincter close tightly, they protect the muscle during bowel movements, and they help you sense the difference between gas, liquid, and stool. Because they’re packed with blood vessels and sit in a sensitive area, they’re prone to swelling when put under pressure.
When those cushions become engorged with blood, stretched out, or start to bulge, that’s what people call piles. The swelling can happen inside the anal canal, outside around the rim, or both at the same time.
Internal vs. External Piles
The anal canal has a dividing line about two centimeters inside the opening. Above this line, the tissue doesn’t have the same pain-sensing nerves as the skin outside. This matters because it determines what you feel.
Internal piles form above that line, inside the canal. They’re covered by the same type of lining as the rest of the intestine. Because of the limited nerve supply, they typically don’t hurt. What you’ll notice instead is bright red blood on toilet paper or in the bowl. If they grow large enough, they can bulge out of the anus during a bowel movement.
External piles form under the skin right at the anal opening. This skin is rich in pain nerves, so external piles tend to hurt, itch, and feel like a small grape or marble sitting on the outside. If a blood clot forms inside one (a thrombosed hemorrhoid), the pain can be intense and sudden.
How Internal Piles Are Graded
Doctors classify internal piles on a four-point scale based on how far they bulge out:
- Grade I: Swollen but stays inside the canal. You may see blood but feel nothing.
- Grade II: Pushes out during a bowel movement but slides back in on its own.
- Grade III: Pushes out and stays out until you gently push it back in with a finger.
- Grade IV: Permanently outside the anus and cannot be pushed back in. These can become clotted or, in rare cases, lose their blood supply entirely.
Most people who have piles fall into the lower grades. The international prevalence data shows that the majority of diagnosed cases are low-severity disease.
What Causes Them
Anything that increases pressure on the veins around the anus can trigger piles. The most common culprits:
Straining during bowel movements is the single biggest factor. Hard stools force you to bear down, which pushes blood into the vascular cushions and stretches them over time. Chronic constipation and chronic diarrhea both contribute, since frequent forceful bowel movements keep the pressure high.
Sitting on the toilet too long is an overlooked cause. When you sit on the toilet, your pelvic floor relaxes and the hemorrhoidal tissue naturally fills with blood. Scrolling your phone for 15 minutes in that position lets the cushions swell and push downward.
Pregnancy combines several risk factors at once. The growing uterus presses on pelvic veins, your blood volume increases by nearly 50%, hormonal shifts slow digestion (leading to constipation), and the physical effort of delivery adds extreme downward pressure.
Aging and genetics weaken the connective tissue that holds the vascular cushions in place, making them more likely to slide downward. Heavy lifting, obesity, and spending long hours sitting also raise intra-abdominal pressure enough to contribute over time.
Symptoms and What to Watch For
The hallmark symptom is painless bright red bleeding, usually noticed on toilet paper or dripping into the bowl after a bowel movement. Internal piles that have prolapsed can feel soft, smooth, and almost rubbery if you touch them. External piles feel firmer, like a small lump at the anal opening, and often itch or ache.
Most anal symptoms turn out to be piles, fissures (small tears in the skin), or fistulas (tiny tunnels between the canal and the skin). But it’s worth knowing the difference between a pile and something more serious. Hemorrhoid lumps feel soft and smooth. A lump that feels hard, irregular, rough, or coarse, especially if it bleeds without the usual straining context, could signal anal cancer or another condition that needs evaluation. Rectal bleeding that persists, changes color to dark red or black, or comes with unexplained weight loss warrants a medical visit regardless of what you think the cause might be.
Home Treatment That Works
Most piles, especially grades I and II, resolve with simple changes. The goal is to soften your stool, reduce straining, and calm the swollen tissue.
Fiber is the foundation. Aim for 25 to 30 grams per day from food, supplements, or both. Start slowly and build up over a week or two to avoid bloating. Fiber pulls water into the stool, making it softer and easier to pass without straining. Drink plenty of water alongside it.
Sitz baths involve sitting in a few inches of warm water for about 20 minutes. Do this after each bowel movement and two to three additional times per day during a flare-up. Afterward, pat the area dry gently or use a hair dryer on a low setting. Rubbing or wiping hard will irritate the tissue further.
Toilet habits matter more than people realize. Limit your time on the toilet to the actual bowel movement. Elevating your feet on a small stool while sitting changes the angle of your rectum, allowing stool to pass more easily and with less strain. Over-the-counter creams and suppositories containing witch hazel or a mild steroid can help with itching and swelling in the short term.
Office Procedures for Persistent Piles
When home measures aren’t enough, rubber band ligation is the most widely used office-based treatment. A tiny rubber band is placed around the base of an internal hemorrhoid, cutting off its blood supply. The tissue shrinks and falls off within two to seven days. Most people don’t feel it during the procedure and can return to work quickly.
The success rate falls between 60% and 80%. Recurrence within a year runs around 49% after a single treatment, but drops to about 38% when the procedure is repeated as needed. It causes significantly less pain and has a shorter recovery than surgery.
Other in-office options include injecting a solution into the hemorrhoid to shrink it (sclerotherapy) and infrared coagulation, which uses heat to seal off the blood supply. These are generally reserved for smaller, lower-grade piles.
When Surgery Becomes Necessary
Surgery is considered when office procedures fail, when piles are grade III or IV, or when a thrombosed external hemorrhoid is caught within 72 hours of forming (early removal gives excellent results in that window). The primary indication is hemorrhoidal disease that affects quality of life through persistent pain, bleeding, or difficulty keeping the area clean.
Several surgical techniques exist, including traditional excision, stapled procedures, and methods that use ultrasound to locate and tie off the arteries feeding the hemorrhoid. Comparative trials show that at one year, outcomes in terms of recurrence and complications are broadly similar across these approaches. The newer artery-ligation techniques tend to cause less pain in the first week and require shorter hospital stays, but long-term results even out.
Recovery from surgical removal typically involves one to two weeks of significant discomfort, since the anal area is sensitive and active with every bowel movement. Stool softeners, sitz baths, and pain management are standard parts of the recovery process. Most people return to normal activity within two to three weeks.