Anal piles, known medically as hemorrhoids, are swollen blood vessels in and around the anus and lower rectum. They’re extremely common, affecting an estimated 3 to 30 percent of adults worldwide, and they range from a mild nuisance to a source of significant pain. The tissue involved is a normal part of your anatomy: blood vessels, connective tissue, and a small amount of muscle that lines the anal canal. Piles develop when that tissue swells, stretches, or slips out of position.
Internal vs. External Piles
Piles fall into two categories based on where they form, and the difference matters because it affects what you feel.
Internal piles develop inside the rectum, above the point where the anal canal begins. The lining covering them isn’t sensitive to touch, pain, stretch, or temperature. That’s why internal piles often go unnoticed until they bleed or prolapse (slide downward and bulge out of the anus). You might see bright red blood on toilet paper or in the bowl without feeling any pain at all.
External piles form under the skin around the outside of the anus. That skin is loaded with nerve endings, which is why external piles tend to hurt, itch, and feel swollen. They can sometimes develop a blood clot inside them, a condition called a thrombosed hemorrhoid. When that happens, the pile turns into a firm, purple-blue lump that you can see or feel near the anus. It can be extremely painful, especially when sitting, walking, or having a bowel movement, with the worst pain typically hitting in the first 48 hours.
What Causes Them
The veins around the anus naturally stretch under pressure. When that pressure is frequent or prolonged, they bulge and swell. Straining during bowel movements is the most common trigger. Holding your breath while pushing creates extra pressure in the veins of the lower rectum, and doing this regularly over months or years gradually weakens the vessel walls.
Other factors that raise your risk include:
- Chronic constipation or diarrhea, both of which keep you on the toilet longer and increase straining
- Pregnancy, which increases pressure in the pelvic veins and adds the strain of delivery
- Sitting for long periods, particularly on the toilet, which pools blood in the anal vessels
- Low-fiber diet, leading to harder stools that require more effort to pass
- Aging, as the connective tissue supporting the anal cushions weakens over time
- Heavy lifting, which raises intra-abdominal pressure in the same way straining does
Recognizing the Symptoms
The symptoms depend on the type and severity. Internal piles often produce painless bleeding, usually bright red blood you notice after wiping. If an internal pile prolapses, you may feel a soft lump that you can push back in, or one that stays outside the anus. There’s sometimes a feeling of fullness or incomplete emptying after a bowel movement.
External piles are more likely to cause itching, swelling, and a visible lump near the anus. If one becomes thrombosed, the pain can be severe enough to make sitting and walking difficult. The lump appears dark blue or purple and feels firm and tender to the touch. Most thrombosed piles improve on their own over one to two weeks as the clot is gradually reabsorbed, though the acute pain usually peaks and begins to ease within the first couple of days.
Dietary and Lifestyle Changes
Fiber is the cornerstone of both prevention and management. It softens stool, adds bulk, and reduces straining. The recommended intake is about 14 grams of fiber per 1,000 calories you eat, which works out to roughly 28 grams a day on a standard 2,000-calorie diet. Most people fall well short of that target. Good sources include beans, lentils, whole grains, vegetables, fruits, and nuts. If you’re increasing fiber, do it gradually over a week or two and drink plenty of water to avoid bloating.
Beyond fiber, a few simple habits make a real difference. Avoid sitting on the toilet longer than necessary (put the phone down). Go when you feel the urge rather than delaying. Stay physically active, since regular movement helps keep things moving through the digestive tract. Warm sitz baths, where you sit in a few inches of warm water for 10 to 15 minutes, can soothe external piles and ease discomfort after bowel movements.
Over-the-Counter Relief
Creams, ointments, and suppositories sold for hemorrhoid relief generally work by temporarily shrinking swollen tissue and calming inflammation. Many contain a vasoconstrictor, a substance that tightens blood vessels to reduce swelling and relieve burning. Others include a low-dose steroid to reduce itching and inflammation. These products help with symptom control, not cure. They’re most useful for flare-ups that you’re managing alongside dietary changes, and they’re typically not meant for use beyond about a week at a time.
Medicated wipes and witch hazel pads offer gentler relief for itching and irritation. Pain relievers taken by mouth can help during a particularly painful episode.
Office-Based Procedures
When home measures aren’t enough, several procedures can be done in a clinic without general anesthesia. They target internal piles that bleed persistently or prolapse.
Rubber band ligation is the most widely used technique. A tiny rubber band is placed at the base of the internal pile, cutting off its blood supply. The tissue shrinks and falls off within a few days. The procedure has a cumulative success rate of about 80 percent, and patients typically return for follow-up sessions spaced roughly three weeks apart. Most people need one to three sessions.
Injection therapy (sclerotherapy) involves injecting a solution into the pile that causes it to shrink. It’s less commonly used than banding but can be effective for smaller piles, with some studies showing very high patient satisfaction for bleeding control.
Both procedures can cause mild discomfort and a sensation of pressure for a day or two. Serious complications are uncommon.
When Surgery Becomes Necessary
Surgery is reserved for large or prolapsed piles that haven’t responded to home treatments and office-based procedures. There are two main surgical approaches.
A hemorrhoidectomy surgically removes the excess hemorrhoid tissue. It’s the most effective option for severe piles, both internal and external, but recovery involves more pain and a longer healing period, often two to four weeks before you’re back to normal activity.
A hemorrhoidopexy (sometimes called a stapled procedure) repositions prolapsed internal tissue back into the anal canal rather than removing it. It isn’t used for external piles. Recovery is generally faster and less painful than a full hemorrhoidectomy, though recurrence rates tend to be somewhat higher over time.
Possible Complications
Most piles are more annoying than dangerous, but ongoing bleeding deserves attention. Chronic blood loss from piles that bleed regularly can, over time, lead to iron-deficiency anemia, leaving you fatigued, pale, and short of breath. If you notice persistent bleeding with bowel movements, it’s worth getting checked. Blood in the stool can also be a sign of other conditions, so an evaluation helps rule those out.
Thrombosed external piles occasionally need drainage if the pain is severe and the clot is caught early, typically within the first 48 to 72 hours. After that window, the clot is already being reabsorbed and the pain is subsiding, so drainage offers less benefit. Rarely, a strangulated internal pile (one that prolapses and gets trapped with its blood supply cut off) requires urgent care.