Most symptomatic hemorrhoids follow a relapsing–remitting course with an excellent overall prognosis, and only about 10% of patients ultimately require surgery.^[1] Asymptomatic or incidentally detected hemorrhoids need no treatment.^[1][2] The main complications of the disease are thrombosis of external hemorrhoids, strangulation of irreducible (grade IV) prolapse with risk of gangrene and perineal sepsis, iron-deficiency anemia from chronic bleeding, and pruritus ani with soiling.^[3][4] Treatment-related complications include pain and delayed bleeding after rubber band ligation, and urinary retention, fecal incontinence, and anal stricture after hemorrhoidectomy. Perineal sepsis after office procedures is rare but can be fatal.^[5] Recurrence rises as treatment becomes less invasive. Excisional hemorrhoidectomy has the lowest recurrence (2%–10%), and its advantage over rubber band ligation is concentrated in grade III disease.^[1][6][7] Rectal bleeding or anemia should never be attributed to hemorrhoids until colorectal cancer and other sources have been excluded.^[4]

• Asymptomatic disease: Hemorrhoidal tissue is common and often silent. In an Austrian screening colonoscopy cohort, 38.9% of patients had internal hemorrhoidal tissue, and 55.3% of these were asymptomatic. Asymptomatic hemorrhoids require no intervention and carry an excellent prognosis.^[1][2]
• Symptomatic internal disease: Usually presents with painless bleeding and/or prolapse and follows a relapsing–remitting course that responds to conservative and office-based measures.^[1] Prolapse grade (I, within the canal; II, spontaneous reduction; III, manual reduction; IV, irreducible) broadly predicts the intensity of treatment required and the risk of recurrence.^[1]
• Thrombosed external hemorrhoids: Most resolve with conservative management over days to weeks, often leaving a residual skin tag. After about 72 hours the thrombus organizes and the overlying hematoma liquefies. Excision within 48–72 hours shortens symptomatic pain and reduces recurrence compared with conservative care.^[3][2]
• Progression to strangulation: Irreducible (grade IV) prolapse can be trapped by anal sphincter spasm, causing venous congestion and strangulation. If untreated, this can progress to necrosis and life-threatening perineal sepsis. It is uncommon, but it is the main reason untreated advanced disease is dangerous.^[4][3]

• Thrombosis: Acute, sharply painful, bluish-purple perianal mass (external hemorrhoids). Erosion of the thrombus may cause bright-red bleeding.^[1]
• Strangulation and necrosis/gangrene: Results from irreducible prolapse with vascular compromise and may progress to life-threatening infection. Management is almost always inpatient and ranges from analgesia and antibiotics to emergency excision.^[3]
• Iron-deficiency anemia: Results from chronic bleeding. Rarely, acute severe bleeding requires transfusion. Anemia mandates full colonic evaluation and should never be attributed to hemorrhoids alone.^[4]
• Pruritus ani, mucous discharge, and fecal seepage/soiling: Caused by prolapse and by skin tags that impede anal hygiene.^[3]
• Residual skin tags: Common after a thrombosed external hemorrhoid resolves. They are a cosmetic and hygienic problem, not a dangerous one.^[1]
• Infection: Significant infection or abscess is not a routine complication of uncomplicated hemorrhoids. It is essentially confined to strangulation/necrosis and to rare post-procedural perineal sepsis.^[2][3]

• The overall prognosis is excellent, and most patients never require surgery (~10% do).^[1]
• Recurrence is the main prognostic trade-off: it rises as treatment becomes less invasive. In a 1,958-patient cohort (mean follow-up 42 months), treatment received was the main independent predictor of recurrence. Rubber band ligation had the highest recurrence and the lowest complication rate, and excisional hemorrhoidectomy had the lowest recurrence.^[7]

• In a Cochrane analysis, excision was superior to rubber band ligation for grade III disease (RR 1.23; 95% CI 1.04–1.45) but not for grade II disease (RR 1.07; 95% CI 0.94–1.21).^[1]
• In the Dutch multicenter HollAND RCT in grade III disease (n = 87), recurrence was 47.5% after rubber band ligation versus 6.1% after hemorrhoidectomy (absolute difference 41%; 95% CI 24%–59%). Banding was not noninferior in quality-adjusted life years, but patients had less pain and returned to work sooner (1 vs 9 days).^[6]
• Grade III disease is therefore a genuine decision point rather than an automatic surgical referral. Patients choosing banding should be counseled on the quantified recurrence penalty.^[6][5]

• Optimal first-line treatment for grade III disease: Society guidance allows both office-based rubber band ligation and excision. The pivotal RCT was small and terminated early (n = 87).^[6][5]
• Bleeding risk with antithrombotic therapy: Systematic reviews suggest increased post-banding bleeding, but a retrospective clopidogrel cohort found no significant difference. The optimal timing for holding and resuming agents is unresolved.^[5]
• Conservative adjuncts: Efficacy of sitz baths, suppositories, and topical anesthetics/steroids rests on scarce evidence despite widespread use.^[3]
• Newer sclerosants: Polidocanol foam may rival rubber band ligation with lower recurrence and fewer complications, based on small trials that need confirmation.^[11]

• Significant pain with internal hemorrhoids suggests strangulation or a thrombosed external component. Otherwise, suspect an alternative diagnosis such as anal fissure.^[3]
• Strangulated hemorrhoids lack concentric mucosal folds and cannot be reduced, which distinguishes them from full-thickness rectal prolapse.^[4]
• The characteristic delayed-hemorrhage windows are 10–14 days after rubber band ligation and 7–10 days after hemorrhoidectomy.^[5][1]
• Fever, severe anal pain, and urinary difficulty after banding suggest perineal sepsis and require urgent examination under anesthesia and antibiotics.^[5]
• Limiting perioperative intravenous fluids to less than 750 mL and providing adequate analgesia reduces urinary retention after hemorrhoidectomy.^[5]