Can Lichen Sclerosus Cause Urinary Tract Infections?

Lichen sclerosus does not directly infect the urinary tract, but it creates anatomical and functional changes that make urinary tract infections significantly more likely. The connection is indirect: lichen sclerosus thins and scars vulvar skin, which can fuse the labia, trap urine, and disrupt the local microbial environment. These downstream effects set the stage for bacteria to thrive where they normally would not. The relationship is well-documented enough that recurrent UTIs are sometimes the complaint that leads to a lichen sclerosus diagnosis in the first place.

How Lichen Sclerosus Changes the Anatomy

Lichen sclerosus is a chronic inflammatory skin condition that predominantly affects the anogenital area. Over time, it thins the outer layer of skin, causes white patches, and produces scarring. In women, this scarring process often leads to labial adhesions, where the inner labia partially or completely fuse together. An 84-year-old woman described in a published case developed labial adhesions secondary to long-standing lichen sclerosus, illustrating how progressive scarring reshapes the vulvar anatomy even when the underlying condition has gone unrecognized for years.¹

These anatomical changes matter for UTI risk because fused labia can partially or fully cover the urethral opening. When that happens, urine does not drain cleanly. It pools, creates a warm and moist environment, and gives bacteria an opportunity to migrate toward the urethra. In severe cases, the scarring can progress to near-total introital obliteration. One reported case involved an 82-year-old woman who presented with almost complete urinary retention, continuous urinary leakage, and recurrent UTI symptoms, all traced back to lichen sclerosus that had sealed shut her vaginal opening.² That degree of obstruction is unusual, but milder versions of the same process, where partial fusion creates pockets that trap urine, are far more common and less likely to be caught.

Lower Urinary Tract Symptoms Are Strikingly Common

Even without dramatic anatomical fusion, women with lichen sclerosus experience urinary problems at rates that stand out from the general population. A study comparing women with lichen sclerosus to women without it found the odds of having lower urinary tract symptoms were more than four times higher in the lichen sclerosus group. Overactive bladder was the most frequently reported type, affecting about two-thirds of women with the condition.³

Why does this matter for UTIs specifically? Overactive bladder and other voiding difficulties don’t cause infections on their own, but they contribute to incomplete bladder emptying. Residual urine sitting in the bladder is one of the best-established risk factors for bacterial growth. When you combine that with the external changes lichen sclerosus causes around the urethra, you get a system where bacteria have both easier access and a better environment to multiply.

Separately, research into urinary incontinence in lichen sclerosus patients has found that about a third of women with the condition report some form of incontinence.⁴ Incontinence itself keeps the vulvar skin chronically moist, which further irritates already-compromised tissue and creates yet another pathway for bacterial colonization near the urethra. A study looking specifically at self-reported urinary comorbidities found that both urinary incontinence and stress urinary incontinence were significantly more prevalent in women with vulvar lichen sclerosus than in the general population.⁵

The Microbiome Angle

Researchers have started looking at whether lichen sclerosus also changes the bacterial community living on vulvar skin, which could shift the balance toward organisms more likely to cause infection. The findings are still early, but they consistently show that the microbiome in affected tissue looks different from healthy tissue.

In one study, the lesional vulvar skin of lichen sclerosus patients showed a depletion of bacteria from the Prevotella genus and Bacteroidales order compared to healthy skin.⁶ Prevotella species are common residents of healthy genital microbiomes, and their loss could leave ecological niches open for less desirable organisms. Another study in postmenopausal women with lichen sclerosus found that most vulvar samples were polymicrobial rather than dominated by protective Lactobacillus bacteria, with vulvar samples being more diverse than vaginal ones.⁷

A third study found that perimenopausal and postmenopausal women with vulvar lichen sclerosus had higher abundances of Enterobacter cloacae on vulvar skin compared to controls, alongside reduced levels of several other bacterial species in vaginal samples.⁸ Enterobacter species are Gram-negative bacteria closely related to the organisms that commonly cause UTIs. Their enrichment on vulvar skin in lichen sclerosus patients is the kind of finding that connects the dots, even if no study has yet proven a direct causal chain from altered vulvar microbiome to increased UTI rates.

The immune side of this equation is also shifting. Research on male genital lichen sclerosus tissue found that Escherichia coli was enriched in affected tissue, while beneficial bacteria were reduced. Genes associated with immune activation, inflammatory response, and pathogen recognition were upregulated.⁹ An immune system that is chronically activated may be less effective at handling new bacterial challenges, making the tissue more susceptible to infection rather than more resistant.

Children Are Affected Differently

Lichen sclerosus in children is rarer than in adults and presents with some different features. The most common symptoms in pediatric vulvar lichen sclerosus are vulvar itching, discomfort, painful urination, and constipation.¹⁰ Dysuria in children with lichen sclerosus is often mistaken for a UTI, leading to rounds of antibiotics that don’t resolve the underlying problem. The burning sensation during urination comes from urine contacting inflamed, thinned skin rather than from bacteria in the bladder.

This diagnostic confusion cuts both ways. Some children with lichen sclerosus do develop genuine UTIs, because labial adhesions in young girls can cover the urethral meatus and create the same urine-trapping problem seen in adults. But pediatricians may not think to examine the vulva closely for lichen sclerosus signs in a child who presents with what looks like a straightforward UTI. When a child keeps getting diagnosed with recurrent UTIs that don’t fully respond to treatment, or when urine cultures come back negative despite urinary symptoms, lichen sclerosus should be on the list of possibilities.

Why Treating the Lichen Sclerosus Helps With Urinary Problems

If the urinary issues stem from anatomical changes and chronic inflammation, it follows that controlling the lichen sclerosus should improve those problems. This is broadly what clinicians observe. The first-line treatment is a potent topical corticosteroid applied to the affected skin. Side effects of topical corticosteroids can include irritation, burning, and dryness, though these are usually due to the cream base rather than the steroid itself. Skin thinning and color changes may occur but are rare in long-term studies of vulvar use.¹¹

Consistent treatment can soften and sometimes reverse mild labial adhesions, improve skin elasticity, and reduce the chronic inflammation that contributes to urinary symptoms. When adhesions are too dense for topical therapy alone, surgical separation may be needed, though recurrence is common without ongoing maintenance treatment. The goal is to stop the cycle: lichen sclerosus creates scarring, scarring traps urine, trapped urine feeds bacterial growth, and the resulting infections add more inflammation to tissue that is already struggling to heal.

For women whose lichen sclerosus has contributed to overactive bladder symptoms or incontinence, treating the skin condition alone may not be enough. These urinary issues can take on a life of their own, involving pelvic floor muscle changes and nerve sensitization that persist even after the skin improves. That is why some patients benefit from pelvic floor therapy or bladder-specific medications alongside their dermatologic treatment.

The Diagnostic Gap

One of the underappreciated problems with lichen sclerosus is how long it takes to get diagnosed. The condition is often mistaken for recurrent yeast infections, chronic irritation from soaps or detergents, or simply attributed to aging or menopause. A woman who presents to her primary care doctor with burning during urination and gets a UTI diagnosis may have lichen sclerosus contributing to or mimicking her symptoms. A systematic review of lichen sclerosus complications confirmed that urogenital issues and sexual dysfunction are among the recognized complications of the disease.¹²

The practical takeaway is that if you keep getting UTIs and standard preventive measures aren’t working, or if you have urinary symptoms alongside vulvar itching, white patches, or pain during intercourse, ask your doctor to specifically examine you for lichen sclerosus. A visual exam by an experienced clinician can often suggest the diagnosis, and a small skin biopsy confirms it. Getting the right diagnosis changes everything about the treatment plan.

When Multiple Specialists Need to Be Involved

Lichen sclerosus sits at the intersection of dermatology, gynecology, and urology, which creates practical challenges for patients. A dermatologist may manage the skin disease but not evaluate voiding dysfunction. A urologist may investigate recurrent UTIs without examining the vulvar skin. Research has highlighted this problem, with one study concluding that the high proportion of patients needing care from multiple specialists underscores the need for dedicated multidisciplinary clinics for vulvar disease.¹³

In practice, these multidisciplinary clinics are uncommon outside of academic medical centers. If you don’t have access to one, the next best approach is ensuring your providers communicate with each other. A gynecologist who knows you have lichen sclerosus should flag it when referring you for urinary complaints, and a urologist treating your recurrent UTIs should know that the anatomical landscape may not be typical. Pelvic floor physical therapists can also play a role, particularly for patients whose voiding dysfunction has a muscular component layered on top of the structural changes from lichen sclerosus.

Lichen Sclerosus in Men and Urinary Complications

Most of the discussion around lichen sclerosus and UTIs focuses on women, partly because the condition is several times more common in females and partly because the female anatomy makes the UTI connection more intuitive. But lichen sclerosus in men, historically called balanitis xerotica obliterans, creates its own set of urinary complications through a different mechanism. The disease affects the foreskin and glans and can progressively scar the urethral opening and even the urethra itself, leading to strictures that obstruct urine flow.

Urethral strictures from lichen sclerosus in men can cause a weak or split urine stream, straining to urinate, and incomplete bladder emptying, all of which raise UTI risk through stagnant urine. The immune changes identified in affected male genital tissue, including enrichment of E. coli and upregulation of innate immune pathways, suggest the tissue itself may be more hospitable to the organisms that cause urinary infections.⁹ Men with lichen sclerosus who develop difficulty urinating or recurrent infections should be evaluated for urethral involvement, as the strictures often require surgical correction rather than topical treatment alone.

Hormonal Overlap and Menopause

Lichen sclerosus has two peak periods of onset: before puberty and after menopause. The postmenopausal peak coincides with another major shift in vulvar and vaginal health driven by declining estrogen. Estrogen loss thins genital tissue, reduces Lactobacillus populations in the vagina, raises vaginal pH, and independently increases UTI susceptibility. When lichen sclerosus develops on top of these estrogen-related changes, the combined effect on local tissue integrity and microbial balance can be substantial.

This overlap creates a clinical challenge because some of the symptoms look identical. Vulvar burning, dysuria, and recurrent UTIs are all features of both genitourinary syndrome of menopause and lichen sclerosus. Topical estrogen helps the former but does not treat the latter, while potent topical steroids treat lichen sclerosus but don’t address estrogen deficiency. Some postmenopausal patients end up needing both. The microbiome research in postmenopausal lichen sclerosus patients, showing predominantly polymicrobial vulvar communities with reduced Lactobacillus dominance, reflects what may be a compounding effect of both conditions on the local bacterial environment.⁷ For postmenopausal women dealing with recurrent UTIs, getting evaluated for both conditions, rather than assuming everything is estrogen-related, can make a meaningful difference in how well treatment works.