By: Dr. Ashley Baldree
When a child develops an unusual line of small bumps or patches on their skin, parents may initially suspect a fungal infection, eczema, or another contagious rash. However, not every persistent skin eruption is caused by an infection. One condition that can create a distinctive linear pattern in children is lichen striatus, a benign inflammatory skin disorder that often resolves without aggressive treatment.
Recently, a 7-year-old boy visited Village Dermatology for evaluation of skin lesions on his chest and back that had been present for several years.
His primary care physician had previously prescribed ketoconazole, an antifungal medication, because the lesions were initially suspected to be fungal. However, the treatment did not improve the affected areas.
His family's concern raised an important question:
“Why does my child have a rash that won't go away, even after using antifungal medication?”
After a focused skin examination using dermoscopy, our dermatology team diagnosed lichen striatus, a noncontagious, inflammatory skin condition that commonly affects children.
The family was reassured about the benign nature of the condition, and a treatment plan using tacrolimus 0.03% ointment was recommended for irritation or inflammation.
What Is Lichen Striatus in Children?
Lichen striatus is an uncommon, benign inflammatory skin condition that primarily affects children.
It typically appears as a narrow, linear arrangement of small, flat-topped or slightly raised bumps called papules.
The bumps may be pink, reddish, tan, or skin-colored, depending on the patient's natural skin tone and the stage of inflammation.
Lichen striatus often follows developmental skin patterns called Blaschko's lines, which represent pathways of skin cell development.
These patterns can appear as straight or curved lines across the arms, legs, chest, or back.
Unlike fungal infections, lichen striatus is not caused by a contagious organism.
Although the precise cause remains uncertain, researchers believe it involves an immune-mediated inflammatory reaction in the skin.
What Does Lichen Striatus Look Like?
The appearance of lichen striatus can vary, but common features include:
Small, flat or slightly raised bumps arranged in a line
Pink, red, brown, or skin-colored papules
Mild scaling or roughness
A narrow band of affected skin
Little or no itching
Temporary changes in skin pigmentation after inflammation resolves
In this patient's case, the dermatologist identified a linear, lichenoid papular eruption involving the left medial superior chest and right superior lateral midback.
The lesions were asymptomatic, meaning they were not causing significant discomfort.
The characteristic appearance and clinical history supported the diagnosis of lichen striatus.
Why Didn't Antifungal Cream Work on This Child's Rash?
Before visiting Village Dermatology, the patient's primary care physician had prescribed ketoconazole because a fungal infection was suspected.
However, the skin lesions persisted despite treatment.
Ketoconazole is an antifungal medication commonly used for conditions such as ringworm, seborrheic dermatitis, and certain yeast-associated skin infections.
Lichen striatus is not a fungal infection.
Because the condition is inflammatory rather than fungal, antifungal medications generally do not treat its underlying cause.
During the dermatology consultation, the family was informed that the clinical findings were not consistent with a fungal infection.
This distinction is important because persistent skin lesions in children may require reassessment rather than repeated use of medications that target an incorrect diagnosis.
How Do Dermatologists Diagnose Lichen Striatus?
Lichen striatus is usually diagnosed through a clinical skin examination.
A dermatologist evaluates the shape, color, distribution, and history of the lesions.
During this patient's visit, our dermatology team examined the chest and back and used a dermatoscope for a closer assessment.
A dermatoscope is a handheld instrument that magnifies the skin and helps clinicians evaluate surface structures and other visible features.
Several conditions can resemble lichen striatus, including:
Linear lichen planus
Linear psoriasis
Inflammatory linear verrucous epidermal nevus (ILVEN)
Certain forms of eczema
Fungal skin infections
In typical cases, a skin biopsy may not be necessary. However, dermatologists may consider additional testing when the appearance is unusual or the diagnosis remains uncertain.
For this patient, the clinical findings supported lichen striatus, and no biopsy was documented.
Can Lichen Striatus Last for Several Years?
Yes, although many cases resolve much sooner.
Lichen striatus is generally considered a self-limited condition, meaning it often improves spontaneously without requiring extensive medical treatment.
Many cases resolve within approximately 6–12 months, but some persist longer.
During this patient's consultation, the family was advised that resolution can sometimes take approximately two to three years and that residual pigmentation changes may remain after the active eruption clears.
Because this child's lesions had already been present for several years, continued observation and reassessment were important.
Treating Lichen Striatus With Tacrolimus 0.03% Ointment
Although lichen striatus often resolves on its own, topical medications may be recommended when inflammation, itching, or irritation develops.
For this patient, our dermatologist prescribed tacrolimus 0.03% ointment.
How Does Tacrolimus Work?
Tacrolimus is a nonsteroidal topical calcineurin inhibitor that reduces certain inflammatory immune responses in the skin.
It is commonly prescribed for atopic dermatitis and may be used off-label for selected inflammatory skin conditions, including lichen striatus.
Because tacrolimus does not cause the same skin-thinning effects associated with prolonged topical corticosteroid use, it may be considered for certain sensitive skin areas.
However, evidence supporting its use specifically for lichen striatus is limited, and treatment does not guarantee faster resolution.
The Patient's Prescribed Treatment
The dermatologist recommended the following regimen:
Tacrolimus 0.03% ointment: Apply to affected areas twice daily for one week. If the affected areas have not healed, discontinue use as instructed.
The medication was intended to manage inflammation or irritation rather than guarantee complete clearance of the lesions.
Possible side effects include temporary burning or stinging at the application site.
Parents should use prescription medications only according to their child's dermatologist's instructions.
Is Lichen Striatus Contagious?
No. Lichen striatus is not contagious.
Children cannot spread it to siblings, classmates, or family members through skin contact, sharing clothing, or playing together.
It is also not caused by poor hygiene.
In most cases, children with lichen striatus can continue their usual activities, including school, sports, and swimming.
Will Lichen Striatus Leave Scars or Dark Spots?
Lichen striatus usually resolves without permanent scarring.
However, some children develop temporary skin discoloration after the inflammation subsides.
This is called post-inflammatory dyspigmentation.
It may appear as darker patches (hyperpigmentation) or lighter patches (hypopigmentation).
These changes can persist for months and occasionally longer, even after the original bumps have disappeared.
Gentle skin care and appropriate sun protection may help minimize the contrast of pigmentation changes while the skin recovers.
How Can Parents Care for a Child With Lichen Striatus at Home?
Most children with lichen striatus do not need an extensive skin care routine.
Supportive care may include gentle, fragrance-free moisturizers to reduce dryness and avoiding harsh soaps or irritating skin products.
If itching develops, a dermatologist may recommend an appropriate topical anti-inflammatory medication or an antihistamine for symptom relief.
Parents should avoid repeatedly applying antifungal creams or potent corticosteroids without a confirmed indication.
Most importantly, the skin should be monitored for changes in appearance, distribution, or symptoms.
When Should Parents Seek a Dermatologist for a Persistent Rash?
Parents should consider a dermatology evaluation when a child's rash:
Persists for several months without improvement
Does not respond to previously prescribed treatment
Develops a distinctive linear or unusual pattern
Spreads to additional areas
Becomes painful, inflamed, or significantly itchy
Causes persistent pigmentation changes or concern about the diagnosis
A dermatologist can help distinguish benign inflammatory conditions from infections and other skin disorders requiring different management.
What Was the Outcome of This Patient's Dermatology Visit?
For this 7-year-old boy, the most important outcome was identifying the underlying condition and explaining why previous antifungal treatment had not worked.
The dermatology examination supported a diagnosis of lichen striatus affecting the chest and back.
The family received counseling about the benign, noncontagious, and usually self-limited nature of the condition.
Tacrolimus 0.03% ointment was prescribed for short-term management of inflammation or irritation.
The family was advised to contact the office if the lesions worsened or spread to other areas.
The patient's response to treatment and eventual resolution were not documented at this visit.
Pediatric Rash and Lichen Striatus Treatment in Houston and Katy, Texas
If your child has a persistent rash, unusual linear skin lesions, or bumps that have not improved with antifungal treatment, a dermatology evaluation may help clarify the diagnosis.
At Village Dermatology, we provide dermatologic evaluations for children and families in Houston, Katy, and surrounding Texas communities.
Our team evaluates pediatric skin conditions including lichen striatus, eczema, fungal infections, psoriasis, and other inflammatory skin disorders.
Recognizing the difference between a harmless, self-limited eruption and a condition requiring treatment can help families avoid unnecessary medications and receive appropriate guidance.
Schedule a pediatric dermatology consultation at Village Dermatology in Houston or Katy, Texas, to have your child's persistent skin lesions evaluated.
Medical disclaimer: This case report is provided for educational purposes. Treatment recommendations vary according to a child's diagnosis, age, symptoms, and medical history. Tacrolimus use for lichen striatus is off-label and should be supervised by a qualified clinician.
