Balanitis xerotica obliterans (BXO) is a long-term (chronic) inflammatory skin condition that affects the penis — most commonly the foreskin and sometimes the glans (head of the penis). Over time, it can cause the skin to become pale/white, fragile and less elastic, leading to scarring and tightening.
This is why BXO can progress to a tight foreskin (phimosis), cracking, repeated splitting, and (in some cases) changes to urination.
BXO is also known as lichen sclerosus. You may also see it referred to as Csillag’s disease or “white spot disease”.
Medical disclaimer: This page provides general information and does not replace an in-person diagnosis. If you cannot pass urine, have rapidly worsening swelling and pain, or have a persistent ulcer/lump that is not healing, seek urgent medical assessment.
What it is
BXO affects the genital skin in uncircumcised males. It can lead to:
- a tight, hardened scar ring at the foreskin tip
- reduced foreskin elasticity (so the foreskin becomes difficult or impossible to retract)
- fragile skin that can crack, split or bleed
- narrowing of the foreskin opening and, in some cases, the meatus (urinary opening)
Who is affected?
BXO can affect males from childhood through to older age. In younger boys, a non-retractile foreskin can be normal for developmental reasons, which is why an examination matters if symptoms suggest scarring.
Is BXO infectious?
No. BXO is not contagious and cannot be passed to a partner. It is not an STI.
What BXO can look like
BXO often causes visible changes such as:
- ivory-white patches on the foreskin (and sometimes the glans)
- skin that looks thin, shiny, fragile or wrinkled
- a pale/white scar-like ring at the foreskin opening
- cracks, small splits, bruising-like marks or erosions
- progressive narrowing of the foreskin opening
How urgent is it?
BXO is not usually an emergency, but it should be assessed because scarring can progress, and a wee hole or tube narrowing can occur in some cases.
Get urgent help today if
- you cannot pass urine, or urine flow becomes rapidly worse
- you have severe pain with rapidly increasing swelling, spreading redness, fever, or you feel unwell
- you develop a persistent ulcer, lump, or non-healing sore on the foreskin or glans
Symptoms
Many people describe a gradual pattern: irritation → cracking/tearing → tightening and difficulty retracting the foreskin.
Symptoms can include:
- itching, soreness or burning around the foreskin
- repeated cracking, splitting, or small tears
- pain during sex or erections
- progressive tightness (phimosis) or difficulty retracting the foreskin
- bleeding from fragile areas, particularly after friction
- recurrent inflammation or infection under the foreskin
Urination symptoms
If the meatus (urinary opening) is affected by scarring, you may notice:
- stinging or discomfort when passing urine
- a weaker stream, spraying, or taking longer to empty the bladder
- obstructed flow in more advanced narrowing
Causes
The exact cause of BXO is not fully understood. It is generally considered an inflammatory condition, and different factors may contribute in different people.
Factors sometimes discussed include:
- immune/inflammatory susceptibility
- chronic irritation (including urine irritation in some cases)
- Diabetes
- rare familial tendency
You may also see discussion of possible associations, such as diabetes or HPV. Where these factors exist, we treat them as potential contributors rather than a single explanation for everyone.
Diagnosis
BXO is often suspected from the appearance of the skin and the pattern of symptoms, particularly when there is a pale/white scar ring and progressive tightening.
During assessment, we focus on:
- the degree of tightness and whether the skin is elastic or scarred
- whether the glans appears involved
- whether there are symptoms suggesting urinary opening narrowing
- whether there is active inflammation or infection that needs treatment first
Biopsy (when needed)
In some cases, confirmation is best made with histology (microscope examination).
A biopsy can help:
- confirm the diagnosis when the appearance is uncertain
- rule out other causes of persistent lesions
- assess concerning or non-healing areas
Treatment
Treatment depends on how advanced the scarring is and whether the urinary opening appears involved.
The aim is to control inflammation, reduce symptoms, and prevent ongoing scarring and functional problems.
First-line treatments (selected cases)
In earlier or milder disease, we may recommend:
- topical steroid ointments/creams to reduce inflammation
- moisturisers/emollients to protect fragile skin
- antifungal or antibiotic treatment if infection is present alongside BXO
These options are usually less reliable if there is established scarring with a tight, hardened ring.
Treatment in adults
- Early symptoms with limited scarring may improve with topical treatment.
- If symptoms persist or scarring is established, adult circumcision is often the most effective long-term option because it removes the diseased foreskin tissue and the tight scar ring.
Treatment in children
Once BXO has caused scarring and a persistently tight, non-retractile foreskin, circumcision is commonly recommended because conservative measures are often less effective when fibrosis is established.
If the urinary opening or urethra is involved
If you have changes in your urine stream, we assess for meatal stenosis (narrowing of the urinary opening). Less commonly, a urethral stricture (wee tube narrowing) can occur.
If suspected, further urology assessment in the hospital and treatment planning may be needed, depending on findings.
What you can do while waiting for the assessment
- Avoid forceful retraction if the foreskin is tight or painful (this can cause tearing and worsen scarring).
- Keep hygiene gentle: warm water is usually enough; avoid harsh or perfumed soaps.
- Seek assessment sooner if you notice changes in your urine stream.
What happens if you don’t treat it
If BXO continues untreated, scarring can progress. This may lead to:
- worsening phimosis and increasing difficulty retracting the foreskin
- recurrent cracking/splitting and bleeding,
- recurrent inflammation or infection under the foreskin
- urinary problems if the meatus becomes narrowed
In adults, long-standing genital lichen sclerosus/BXO has been associated with penile cancer in some reports. Penile cancer remains uncommon, but persistent ulcers, lumps, or non-healing lesions should always be assessed promptly.
How can we help
At London Circumcision Centre, we provide a structured pathway focused on clear diagnosis, reliable treatment decisions, and follow-up when needed.
What happens at your appointment
- symptom review (tightness, cracking, pain, urinary changes)
- examination of the foreskin, glans and any scar ring
- discussion of options and what is most likely to work long-term
- planning for treatment where appropriate, including aftercare and follow-up
Our typical care pathway
- assessment and discussion of options (topical treatment, circumcision, or onward planning if urinary involvement is suspected)
- pre-procedure consultation if surgery is chosen
- aftercare guidance
- biopsy/histology when clinically appropriate
- review around six weeks and further follow-up if needed
- longer-term monitoring advice for confirmed cases, particularly if symptoms persist
Cost
Costs depend on what we find on examination and the treatment that is appropriate for you.
Common cost items are:
- Biopsy (if needed to confirm diagnosis or assess a persistent lesion): £250
- Follow-up consultation (if recommended): £150
- Circumcision (if scarring is established and surgery is recommended): price depends on the procedure plan
- Our current listed fee for adult circumcision with frenuloplasty is £760 (where this combined approach is clinically appropriate).
If we recommend any treatment, we will explain why it is needed and confirm the full cost before you proceed.
If you have symptoms of BXO or progressive tightness/cracking of the foreskin, contact London Circumcision Centre to book an assessment on +44 7527 314081 so we can confirm the likely diagnosis and guide you through the safest treatment plan.