Symptomatic engorgement of internal or external hemorrhoidal cushions; common cause of rectal bleeding.
Also known as: hemorrhoids, piles, internal hemorrhoids, external hemorrhoids, thrombosed hemorrhoid
Overview
Symptomatic engorgement and prolapse of the anal cushions (vascular structures in the anal canal). Internal hemorrhoids arise above the dentate line (visceral innervation — painless); external hemorrhoids arise below the dentate line (somatic innervation — painful when thrombosed).
Epidemiology
Lifetime prevalence 50-75%. Peak age 45-65. Equal sex distribution; pregnancy markedly raises incidence in women.
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Question 1GastrointestinalMedium
A 52-year-old woman reports several months of painless, bright red blood coating the toilet paper after most bowel movements. She eats a low-fiber diet and strains frequently with hard stools. She denies weight loss, abdominal pain, or change in stool caliber. Anoscopy reveals grade II internal hemorrhoids, and a colonoscopy performed last month was normal. If her bleeding continues untreated, which of the following complications is she at greatest risk of developing?
AIron-deficiency anemia
BStrangulated prolapse
CThrombosed hemorrhoid
DAcute hemorrhagic shock
EAnemia of chronic disease
Reveal answer & full explanation
Correct answer: A — Iron-deficiency anemia
AIron-deficiency anemia✓
BStrangulated prolapse
CThrombosed hemorrhoid
DAcute hemorrhagic shock
EAnemia of chronic disease
Why Iron-deficiency anemia is correct
Chronic low-grade bleeding from internal hemorrhoids is the most common complication, producing slow occult blood loss that gradually depletes iron stores.
Over months this can lower hemoglobin and produce a microcytic, hypochromic (low-MCV) anemia; checking a CBC is appropriate, and her recent normal colonoscopy has already excluded a proximal or malignant source of bleeding.
Why the others are wrong
Acute hemorrhagic shock — hemorrhoidal bleeding is low-volume outlet-type bleeding that streaks the paper; massive hemorrhage severe enough to cause shock is rare and would present abruptly rather than as months of painless spotting.
Strangulated prolapse — requires hemorrhoids that prolapse and cannot be reduced (grade IV); hers are grade II and reduce spontaneously after defecation.
Thrombosed hemorrhoid — acute clot formation causes sudden severe anal pain and a tender bluish lump, most often in an external hemorrhoid; it is unrelated to how long painless internal bleeding continues.
Anemia of chronic disease — months of ongoing bleeding make a chronic anemia sound right, and both conditions can lower serum iron, but anemia of chronic disease comes from inflammatory cytokines and hepcidin trapping iron in macrophages (ferritin normal or high), whereas steady blood loss drains iron stores (low ferritin), and nothing in her history suggests a chronic inflammatory, infectious, or malignant process.
Question 2GastrointestinalEasy
A 52-year-old man presents with intermittent painless bright red blood on the toilet paper after bowel movements for the past 3 months. He reports hard, infrequent stools and often spends 15-20 minutes straining on the toilet while reading. He eats a diet heavy in processed foods and drinks little water. He has a BMI of 27 and works a desk job. Anoscopy reveals nonprolapsing internal hemorrhoids. Which of the following is the strongest risk factor for this condition?
ASedentary desk occupation
BOverweight body habitus
CAge older than 50 years
DStraining at hard stool
EMale sex of the patient
Reveal answer & full explanation
Correct answer: D — Straining at hard stool
ASedentary desk occupation
BOverweight body habitus
CAge older than 50 years
DStraining at hard stool✓
EMale sex of the patient
Why Straining at hard stool is correct
Repeated straining against hard stool raises intra-abdominal pressure, engorging the anal vascular cushions and weakening their supporting connective tissue (Treitz muscle/Parks ligament), allowing downward displacement and prolapse.
Chronic constipation with straining is the single most consistently implicated and modifiable driver of hemorrhoid development, which is why first-line therapy targets it directly: fiber 25-35 g/day, hydration, bulk-forming laxatives, and avoiding prolonged toilet sitting.
This patient's hard infrequent stools, low-fiber/low-water diet, and prolonged straining all converge on this mechanism.
Why the others are wrong
Sedentary desk occupation - prolonged sitting is a contributory factor, but it acts largely by promoting constipation and reduced bowel motility, so it is downstream and weaker than the straining itself.
Overweight body habitus - a real but weaker contributing risk factor; a BMI of 27 is overweight (not obese) and is a minor influence compared with the daily straining driving his disease.
Male sex of the patient - hemorrhoids have an essentially equal sex distribution, so sex is not a meaningful risk factor; pregnancy (not male sex) is the notable sex-specific contributor, and it raises risk in women.
Age older than 50 years - hemorrhoid prevalence peaks in middle age as the connective tissue supporting the anal cushions weakens, so his age of 52 fits, but age is a nonmodifiable background factor that is weaker than the daily straining against hard stool driving his disease.
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Cirrhosis with portal hypertension (more often anorectal varices than true hemorrhoids)
Pathophysiology
Increased intra-abdominal pressure and straining engorge the anal vascular cushions; weakening of the connective tissue (Treitz muscle/Parks ligament) allows downward displacement and prolapse. Mucosal trauma during defecation causes bleeding.
Clinical presentation
Symptoms
Internal: PAINLESS bright red blood per rectum on tissue or coating stool; sensation of fullness; prolapse with defecation
Clinical diagnosis. Internal hemorrhoids graded by Goligher classification I-IV: I (no prolapse), II (prolapse with defecation, reduces spontaneously), III (prolapse requiring manual reduction), IV (irreducible prolapse).
Labs
CBC if anemia suspected (chronic blood loss)
Imaging
Anoscopy — direct visualization of internal hemorrhoids
Flexible sigmoidoscopy or colonoscopy if age ≥45, alarm features (weight loss, change in bowel habit, anemia, family history of CRC) or atypical/persistent bleeding — to exclude malignancy and proximal sources
DRE — assess for masses but does NOT exclude hemorrhoids (compressible)
Diagnostic algorithm
Goligher Grade
Description
Preferred Treatment
I
Bleed without prolapse
Conservative; consider sclerotherapy or band ligation if refractory
II
Prolapse with defecation, reduces spontaneously
Rubber band ligation
III
Prolapse requiring manual reduction
Rubber band ligation or hemorrhoidectomy
IV
Irreducible / chronic prolapse
Excisional hemorrhoidectomy
Goligher classification of internal hemorrhoids — grade directs management.
Treatment
First-line
Dietary fiber (25-35 g/day) and adequate hydration
Bulk-forming laxative — psyllium, methylcellulose
Avoid prolonged toilet sitting and straining
Sitz baths 15 min several times daily
Topical analgesics and astringents (witch hazel, lidocaine)
Short-course topical hydrocortisone (limit to <1 week to avoid skin atrophy)
Grade I-II and select grade III internal hemorrhoids — refractory to conservative measures
Rubber band ligation — most effective office procedure
Sclerotherapy — phenol or ethanolamine injection
Infrared photocoagulation
Grade III-IV internal hemorrhoids or refractory disease
Excisional hemorrhoidectomy (Milligan-Morgan or Ferguson) — most effective but most painful
Stapled hemorrhoidopexy (PPH) — less postoperative pain, higher recurrence
If presenting within 48-72 h with severe pain: excision (NOT incision and drainage) under local anesthesia
After 72 h or improving: conservative management — sitz baths, analgesia, stool softeners; thrombus resorbs over weeks
Second-line / adjunct
Oral phlebotonics (flavonoids) — modest benefit in some studies; not FDA-approved in US
Treat underlying constipation aggressively
Manage pregnancy-related hemorrhoids conservatively whenever possible; topical agents safe in most cases
Complications
Iron-deficiency anemia from chronic bleeding
Thrombosis and necrosis
Prolapse, strangulation
Incontinence after surgical procedures (rare with modern technique)
Anal stenosis after extensive hemorrhoidectomy
Recurrence
PANCE pearls
Painless bright red bleeding is the hallmark of INTERNAL hemorrhoids — pain suggests fissure, thrombosed external hemorrhoid, or other diagnosis.
NEVER attribute rectal bleeding to hemorrhoids in patients ≥45 without colonoscopy — colorectal cancer is missed when this rule is violated.
Thrombosed external hemorrhoid presenting within 48-72 h benefits from EXCISION (not incision) under local anesthesia; after 72 h, conservative management.
Rubber band ligation is most effective office-based therapy for grade I-II and select grade III; can be repeated.
Avoid rubber band ligation in immunocompromised patients (sepsis risk) and patients on anticoagulation.
Hemorrhoidectomy is painful — multimodal analgesia, sitz baths, stool softeners, and pelvic floor relaxation reduce postoperative discomfort.
In cirrhotic patients with anorectal bleeding, consider anorectal varices — managed differently (TIPS, endoscopic banding); avoid hemorrhoidectomy.
Anoscopy is the most useful office tool — DRE cannot evaluate internal hemorrhoids.
References
ASCRS 2024 — Hawkins AT, Davis BR, Bhama AR, et al. The American Society of Colon and Rectal Surgeons Clinical Practice Guidelines for the Management of Hemorrhoids. Dis Colon Rectum 2024;67(5):614-623
ACG 2021 — Wald A, Bharucha AE, Limketkai B, et al. ACG Clinical Guidelines: Management of Benign Anorectal Disorders. Am J Gastroenterol 2021;116(10):1987-2008
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