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Benign anorectal disease, from haemorrhoids to prolapse - a clear, modern plan.

Common, treatable and often quietly endured. Bowel habits, topical care and modern day-case surgery resolve most anorectal problems.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE, ACPGBI and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK coloproctology practice including HALO, laser, LIFT, VAAFT and ventral mesh rectopexy.

Key facts

Anorectal disease at a glance.

The essentials in plain English - the conditions, the shared symptoms and how modern UK coloproctology treats them.

  • What it covers

    A family of conditions around the anus and rectum, from haemorrhoids and fissures to fistulas, abscesses, pilonidal disease, pruritus, prolapse and incontinence.

  • Most common

    Haemorrhoids and anal fissures - both usually manageable with lifestyle, laxatives and topical therapy.

  • When to worry

    Any PR bleeding with change in bowel habit, weight loss, anaemia or age over 50 needs colonoscopy to exclude cancer.

  • Modern surgery

    HALO, laser haemorrhoidoplasty (HeLP), LIFT, VAAFT and laparoscopic ventral mesh rectopexy have reduced pain and recovery times.

  • Fistula and Crohns

    Complex or recurrent perianal fistula should prompt assessment for Crohns disease with MRI pelvis and colonoscopy.

  • Team approach

    Colorectal surgeon, specialist nurse, pelvic floor physio and - for prolapse or incontinence - urogynaecology working together.

Why this guide matters

Common problems, quietly endured.

Most people wait too long to seek help. Early assessment usually rules out anything sinister and puts a proper plan in place.

  • Symptoms overlap

    Bleeding, pain, itch and prolapse can all come from more than one cause - proper examination sorts them out.

  • Bleeding is never to be ignored

    Piles are common but so is bowel cancer - PR bleeding with red flags needs colonoscopy, not reassurance.

  • Modern surgery is gentler

    HALO, laser, LIFT, VAAFT and ventral mesh rectopexy have shortened recovery and reduced complications.

How the diagnosis is made

From first symptoms to a clear diagnosis.

The steps a colorectal team will normally follow - history, examination, endoscopy and, when needed, imaging and physiology.

  1. 01

    Assessing

    History and red-flag screen

    Bleeding, pain, prolapse, discharge, itch, bowel habit, straining and family history of colorectal cancer.

  2. 02

    Assessing

    External inspection

    Perianal skin for tags, fissures, external haemorrhoids, fistula openings, abscess, pilonidal pits and dermatoses.

  3. 03

    Assessing

    Digital rectal examination

    Sphincter tone, tenderness, masses and prostate in men - the cornerstone of anorectal assessment.

  4. 04

    Confirming

    Proctoscopy and sigmoidoscopy

    Proctoscopy for haemorrhoids and low rectum; rigid or flexible sigmoidoscopy to view the distal colon.

  5. 05

    Confirming

    Colonoscopy if red flags

    Age over 50, change in bowel habit, weight loss, iron-deficiency anaemia or family history of colorectal cancer.

  6. 06

    Planning

    Imaging for complex disease

    MRI pelvis for fistula and prolapse, endoanal ultrasound for sphincter integrity, defecating proctography for functional disorders.

  7. 07

    Planning

    Anorectal manometry

    For incontinence, obstructed defecation and pre-operative planning - measures sphincter pressures and rectal sensation.

Typical timeline: most patients have a diagnosis and plan within one or two visits.

Symptoms

What anorectal disease actually looks like.

The shared symptoms across piles, fissure, fistula, abscess, pilonidal, prolapse and incontinence - and the features that raise concern.

  • PR bleeding

    Bright red on paper or coating stool - typical of haemorrhoids or fissure, but always exclude sinister causes.

  • Anal pain

    Severe on defecation suggests fissure; throbbing, constant pain with swelling suggests abscess or thrombosed pile.

  • Prolapse

    Something coming down - haemorrhoidal, mucosal or full-thickness rectal prolapse.

  • Perianal swelling

    Tender lump may be thrombosed external pile, abscess, sentinel pile or pilonidal cyst.

  • Discharge and soiling

    Persistent moisture or pus points to fistula-in-ano, chronic abscess or advanced pilonidal disease.

  • Pruritus ani

    Intense perianal itch - idiopathic or driven by haemorrhoids, eczema, candida, threadworms or STIs.

  • Faecal incontinence

    Urgency, passive leakage or soiling - often multifactorial with sphincter, pelvic floor and stool consistency involved.

  • Red flag - change in bowel habit

    New change lasting weeks, especially with bleeding, weight loss or anaemia, requires colonoscopy.

Treatment

How anorectal disease is treated.

A stepped plan from lifestyle and topical care through office procedures to modern day-case and pelvic floor surgery.

  • Lifestyle and laxatives

    High-fibre diet 25 to 35 g/day, 2 L fluid, regular toileting, squat position, avoiding straining and Fybogel or macrogol as needed.

  • Topical therapy for piles

    Anusol or Preparation H, short-course topical steroid, local anaesthetic ointment for symptom relief in grade I to II haemorrhoids.

  • Office procedures for piles

    Rubber band ligation and sclerotherapy for grade I to II - quick, well tolerated and effective as an outpatient.

  • HALO and laser haemorrhoidoplasty

    Modern day-case options - see /treatments/haemorrhoid-artery-ligation-halo/ and /treatments/laser-haemorrhoidoplasty-hela/ - reduced pain versus classic surgery.

  • Haemorrhoidectomy

    Milligan-Morgan excision or stapled haemorrhoidopexy (PPH) for grade III to IV disease or failed lesser procedures.

  • Fissure - topical relaxants

    GTN 0.4% or diltiazem 2% ointment for 6 to 8 weeks; Botulinum toxin for refractory cases before considering surgery.

  • Lateral internal sphincterotomy

    Selective surgery for chronic fissure that fails medical therapy - see /treatments/lateral-internal-sphincterotomy/. Small incontinence risk discussed carefully.

  • Fistula surgery

    Seton, fistulotomy, LIFT, advancement flap, FiLaC laser, VAAFT, collagen plug or Alofisel stem cells in Crohns disease.

  • Abscess drainage

    Urgent incision and drainage under GA - antibiotics alone are not enough. Second-stage fistula assessment often follows.

  • Pilonidal treatment

    Hair removal, phenol, Bascom, Karydakis, Limberg flap, EPSiT and laser - see /treatments/pilonidal-sinus-treatment/. Lateralised closure reduces recurrence.

  • Rectopexy for prolapse

    Delormes or Altemeiers perineal repair, or laparoscopic ventral mesh rectopexy - see /treatments/laparoscopic-ventral-mesh-rectopexy/.

  • Pelvic floor and neuromodulation

    Biofeedback, pelvic floor physiotherapy, sacral nerve stimulation (SNS) and PTNS for incontinence and obstructed defecation.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or colorectal surgeon knows your history and can tell you which parts apply to you. If in doubt, get seen.

  • NICE. Haemorrhoids: management (CKS).

  • NICE. Anal fissure: management (CKS).

  • Association of Coloproctology of Great Britain and Ireland (ACPGBI). Position statements on haemorrhoids, fistula-in-ano and rectal prolapse.

  • NICE IPG. Laser haemorrhoidoplasty, HALO and ventral mesh rectopexy interventional procedure guidance.

  • European Society of Coloproctology (ESCP) guidelines on perianal abscess and fistula.

Red flags

When anorectal symptoms need urgent attention.

Most cases settle with lifestyle, topical care and day-case surgery. These are the situations that need faster action.

  • PR bleeding with red flags

    Age over 50, change in bowel habit, weight loss, iron-deficiency anaemia or family history - urgent 2WW referral and colonoscopy.

  • Perianal abscess

    Severe pain, swelling, fever and inability to sit - needs urgent surgical drainage under general anaesthetic.

  • Fournier gangrene

    Rapidly spreading perineal necrosis with systemic sepsis - a surgical emergency needing immediate debridement.

  • Complex or recurrent fistula

    Multiple tracks, high or recurrent fistula - warrants MRI pelvis and assessment for Crohns disease.

  • Suspicious anal or perianal lesion

    Ulcer, indurated mass, non-healing skin change - biopsy to exclude anal or perianal cancer.

  • New faecal incontinence

    Especially post-partum or after anorectal surgery - needs endoanal ultrasound and manometry.

  • Immunosuppression or diabetes

    Lower threshold for imaging, drainage and admission - abscesses spread faster and heal slower.

  • Pregnancy and postpartum symptoms

    Common but under-reported - fissure, haemorrhoids and obstetric sphincter injury deserve dedicated review.

  • Rectal prolapse in the elderly

    Often coexists with incontinence and pelvic floor dysfunction - a colorectal and pelvic floor MDT question.

Living with it

Small habits, big difference.

Bowel habit and hygiene do more day to day than any tube of cream. Get the basics right and most anorectal problems ease.

A quiet reminder

Do not let embarrassment delay diagnosis.

Colorectal teams see these problems every day. A short examination almost always sorts out what is going on.

  1. 01 Bowels

    Soft, formed stool is the goal

    Fibre, fluid and unhurried toileting prevent most anorectal flares. Fybogel or a small dose of macrogol helps if diet alone is not enough.

  2. 02 Habit

    Do not sit and strain

    Two to three minutes on the toilet is plenty. Leave and try again later rather than pushing - straining drives piles, fissures and prolapse.

  3. 03 Skin

    Gentle hygiene

    Rinse with water, pat dry, avoid perfumed wipes and scrubbing. A thin barrier cream calms most pruritus ani.

  4. 04 Ask

    Get it looked at

    Embarrassment delays diagnosis. A brief examination usually settles the question and rules out anything sinister.

Frequently asked

Everything we get asked about anorectal disease.

Quick answers on piles, fissure, fistula, prolapse and incontinence.

  • What is benign anorectal disease?

    An umbrella term for non-cancerous conditions of the anus and rectum, including haemorrhoids, anal fissure, fistula-in-ano, perianal abscess, pilonidal sinus, pruritus ani, rectal prolapse, solitary rectal ulcer syndrome and faecal incontinence.

  • Are haemorrhoids dangerous?

    Rarely. Most cause bleeding, itch or prolapse and settle with lifestyle changes, topical treatment or office procedures. But any PR bleeding with change in bowel habit, weight loss or anaemia needs a colonoscopy to exclude bowel cancer.

  • How is an anal fissure treated?

    Soften the stool with fibre, fluid and a laxative, then use GTN 0.4% or diltiazem 2% ointment for 6 to 8 weeks. Refractory fissures may need Botulinum toxin or lateral internal sphincterotomy.

  • What is the difference between an abscess and a fistula?

    A perianal abscess is an acute collection of pus that needs urgent drainage. A fistula is a chronic track between the anal canal and skin that often follows an abscess, classified by the Parks system and imaged with MRI.

  • Do I really need surgery for piles?

    Not usually. Most respond to lifestyle, topical therapy and office procedures like banding. Modern options such as HALO or laser haemorrhoidoplasty are less painful than classical excision when surgery is needed.

  • When should I worry about rectal prolapse or incontinence?

    Any full-thickness prolapse or new faecal incontinence deserves specialist assessment with anorectal manometry, endoanal ultrasound and, where relevant, defecating proctography. Treatment ranges from pelvic floor physio and SNS to ventral mesh rectopexy.

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