Anal itching (pruritus ani)

Anal itching, called pruritus ani, is a common and persistent urge to scratch the skin around the back passage, often worse at night or after a bowel movement. Common causes are moisture, small amounts of stool leakage, over-cleaning with soap, certain foods and drinks, piles, fissures, skin conditions and infections such as threadworms. Often no single cause is found. Gentle care helps most people: wash with water only, pat dry and avoid scratching. Itching that persists or comes with bleeding, a lump or pain should be examined.

What is anal itching (pruritus ani)?

Anal itching, or pruritus ani, is a persistent urge to scratch the skin around the anus, often worse at night or after bowel movements. It is a symptom rather than one disease. Scratching damages the skin and makes it itch more, so an itch-scratch cycle can keep it going after the original trigger has gone.

Pruritus ani describes itching of the skin around the anus rather than a single disease. Doctors divide it into primary, where no specific cause is found, and secondary, where a cause such as piles, a skin condition or an infection can be identified and treated.

What causes anal itching?

Common causes of anal itching are moisture, small amounts of stool or mucus leakage, over-cleaning with soap or wipes, and foods and drinks such as coffee, alcohol, citrus and spicy food. Piles, fissures, skin conditions, threadworms and other infections, and some medicines can also cause it. Often no single cause is found.

Moisture from sweat, or small amounts of stool or mucus leaking onto the skin
Washing too often or with soap, scented products, wipes or rough toilet paper
Coffee, tea, cola, alcohol, citrus, spicy food, chocolate, tomatoes and nuts in some people
Piles (haemorrhoids), anal fissures and anal fistulas
Skin conditions such as eczema, psoriasis or contact dermatitis
Infections such as threadworms, fungal infections or sexually transmitted infections
Side effects of some creams, antibiotics and long-term medicines
Rarely, diabetes or anal cancer

What are the symptoms?

The main symptom of pruritus ani is itching around the anus that is hard to resist, often worse at night or after a bowel movement. Scratching can cause soreness, burning and red or broken skin. Over time the skin can become thickened. Other symptoms, such as bleeding, point towards an underlying cause.

Itching around the anus that is hard to resist
Itching that is worse at night or after bowel movements
Soreness or burning from scratching
Red, thickened or broken skin around the anus

When should I see a doctor about anal itching?

See a doctor if anal itching does not improve after two to three weeks of gentle self-care, keeps coming back, or comes with blood in the stool, bleeding or discharge, a lump or sore, pain, or a change in bowel habit. Persistent itching should be examined, because rarely it can have a serious cause.

The warning signs below need prompt attention.

Blood in the stool, which may be dark red or black
Bleeding or leaking fluid from the back passage
A lump, sore or change around the anus that is not usual for you
A change in bowel habit
Itching that is not improving after two to three weeks of self-care, or keeps coming back

How is it diagnosed?

Anal itching is assessed by asking about the itch, bowel habit, cleaning routine, diet and every cream used, then gently examining the skin. A rectal examination and short scope look for piles or fissures. Swabs, scrapings, patch tests or, for unusual skin, a biopsy are used when needed.

Questions about how long the itch has lasted, bowel habit, cleaning routine, diet and all creams used
Gentle examination of the skin around the anus
Digital rectal examination and a short scope (anoscopy) to look for piles, fissures or other causes
Skin swabs, scrapings or patch tests when an infection or allergy is suspected
A skin biopsy when the appearance is unusual

How is anal itching treated?

Treatment of anal itching aims for clean, dry, intact skin. Wash with water only and pat dry, avoid soap, scented products and scratching, wear cotton underwear, take fibre for formed stools and cut down on trigger foods. Prescribed creams are used sparingly, and any underlying cause such as threadworms or piles is treated.

Washing with water only, then patting dry without rubbing
Avoiding soap, scented products, powders and repeated wiping
Wearing loose cotton underwear and keeping the area dry
Fibre to produce soft, formed stools that leave less residue
Cutting down on foods and drinks that seem to trigger the itch
A short course of prescribed cream, used sparingly and as directed
Treating the cause, such as threadworms, piles, a fissure or a skin condition
Specialist injection treatment for selected long-standing cases that do not respond

Is it covered by MediSave or insurance?

Dr Wong is a panel doctor under Alliance Medinet. Before your procedure, he can request pre-authorisation from Prudential and AIA, and the clinic writes in to other insurers in the same way. Prudential patients can claim when Dr Wong operates at Aptus Surgery (Paragon), a day surgery centre listed on Prudential's PRUPanel Connect. Pre-authorisation is decided by the insurer and is not a guarantee of payment. Eligible charges may be paid from MediSave within the limits for your procedure, and any uncovered balance is paid in cash.

How it works, step by step: fees, MediSave and insurance.

What is recovery like?

First week Some relief is common
Once irritation and scratching stop
Settling Often 4 to 6 weeks
Keep following the skin care routine
Longer term Ongoing habits
Symptoms can return, so keep avoiding known triggers

What are the risks and complications?

Persistent scratching can break the skin and lead to infection. Using creams for too long can irritate or dry the skin and worsen the itch. Itching often recurs. The main risk of not seeking care is missing an underlying cause, which is why ongoing itching should be examined.

Skin damage and infection from scratching
Irritation or dryness of the skin from prolonged use of creams
Itching returning if triggers come back, which is common
A serious cause being missed if persistent itching is not examined

How much does it cost in Singapore?

The cost depends on the treatment you need and how complex it is. MOH publishes fee benchmarks for most surgical procedures, and Dr Wong's fees are guided by them. After your consultation the clinic gives you a written estimate before you decide. See fees, MediSave and insurance.

Medically reviewed by Dr Wong Nan-Yaw

MBBS (NUS), FRCS (Edinburgh). 33 years in medicine (since 1993), 23 years as an accredited specialist (since 2003) and 18 years in private practice at Mount Elizabeth (since 2008). Last reviewed 6 November 2026.

Frequently asked questions

Is anal itching caused by poor hygiene?

Rarely. More often the problem is too much cleaning, especially with soap or rubbing, which damages the skin and removes its natural protection. Gentle washing with water and patting dry is usually better.

Can piles cause itching?

Yes. Piles, fissures and fistulas can cause itching, often with bleeding or discomfort. Examination tells them apart and allows the cause to be treated.

Should I use an over-the-counter cream?

A short course may help, but prolonged use of creams can irritate or dry the skin and make itching worse. Tell your doctor straight away if a cream makes the itch worse.

How long does it take to settle?

Many people notice some relief within a week of changing their routine. Complete settling often takes four to six weeks, and symptoms can return, so long-term habits matter.

Could anal itching be a sign of cancer?

It is unusual for anal itching to be caused by something serious, but rarely it can be linked to anal cancer or diabetes. Itching that persists, or comes with bleeding or a lump, should be examined.

References and further reading

Haemorrhoids

Haemorrhoids and piles treatment by colorectal surgeon Dr Wong Nan-Yaw in Singapore. Symptoms, procedures, recovery, cost and MediSave explained.

Anal fissure

Acute and chronic anal fissure treatment by Singapore colorectal surgeon Dr Wong Nan-Yaw. Symptoms, creams, surgery, cost and recovery information.

Anal fistula

Anal fistula diagnosis and surgery by colorectal surgeon Dr Wong Nan-Yaw in Singapore, with recovery, cost and MediSave information.

Faecal incontinence

Faecal incontinence assessment and treatment by colorectal surgeon Dr Wong Nan-Yaw, with pelvic floor, bowel and surgical options.

See Dr Wong at Mount Elizabeth Medical Centre

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