Lichen Nitidus
Tiny, shiny, harmless skin bumps
Quick Facts
- Type: Benign skin condition
- Appearance: Tiny, shiny, flesh-colored bumps
- Common in: Children and young adults
- Outlook: Harmless; often clears on its own
Overview
Lichen nitidus is an uncommon, benign skin condition characterized by numerous tiny bumps about the size of a pinhead. The bumps are typically shiny, dome-shaped, and the same color as the skin or slightly lighter, and they often appear in clusters. It is most often seen in children and young adults.
Although its name resembles the more common condition lichen planus, lichen nitidus is a separate, harmless condition. It is not contagious, not cancerous, and usually does not cause symptoms beyond the appearance of the bumps. In many cases it clears on its own over months to a couple of years without treatment.
Symptoms
The main feature is the distinctive small bumps, which have a characteristic look.
- Tiny, pinhead-sized, shiny, raised bumps
- Flesh-colored, pale, or slightly pink; they may look lighter or darker on different skin tones
- Clusters often on the chest, abdomen, arms, backs of the hands, and genitals
- Usually no symptoms, though some people have mild itching
- Bumps may appear in lines where the skin has been scratched or injured
The condition is cosmetic in most cases and does not threaten general health.
Causes
The exact cause of lichen nitidus is not known. It is thought to involve the immune system, with certain immune cells (lymphocytes) gathering in small areas of the skin and producing the tiny bumps. It is not caused by infection and is not contagious.
Lichen nitidus sometimes occurs in people who also have lichen planus or other skin conditions, which has led researchers to look at possible links between them. However, in most people it appears without any clear trigger or associated illness.
Risk Factors
- Childhood or young adulthood, the most common ages affected
- Having lichen planus or certain other skin conditions in some cases
- Skin trauma or scratching, which can cause bumps to line up along the injury
In most people, lichen nitidus appears without an identifiable risk factor.
Diagnosis
Lichen nitidus is usually diagnosed by its distinctive appearance during a skin examination.
- Visual examination: The clusters of tiny, shiny, uniform bumps are often recognizable to a clinician or dermatologist.
- Skin biopsy: Occasionally a small sample of skin is examined under a microscope to confirm the diagnosis or to distinguish it from similar conditions.
Because several conditions can cause small skin bumps, an exam helps separate lichen nitidus from lichen planus, warts, and other rashes.
Treatment
Because lichen nitidus is harmless and often clears on its own, treatment is frequently unnecessary.
- Observation: Many cases need no treatment and resolve over months to a couple of years.
- Topical corticosteroids: May be used to reduce itching or for cosmetic concerns.
- Antihistamines: Can help if mild itching is bothersome.
- Other options: For widespread or persistent cases, a dermatologist may consider light therapy or other treatments.
Reassurance is often the most important part of care, since the condition is benign and usually temporary.
Prevention
There is no known way to prevent lichen nitidus because its cause is not understood. General skin care measures may help limit irritation:
- Avoid scratching, which can cause bumps to appear along the scratch lines
- Use gentle skin care and moisturizers if the skin feels dry or itchy
- Follow your clinician's advice if you are using prescribed treatments
When to See a Doctor
See a clinician or dermatologist if you notice new clusters of tiny bumps and want a diagnosis, or if the bumps are itchy, spreading, or bothersome. Seek evaluation if:
- You are unsure what the rash is
- The bumps itch significantly or affect your comfort or appearance
- The rash changes in a way that concerns you, such as becoming painful, crusted, or bleeding
While lichen nitidus itself is harmless, a clinician can confirm the diagnosis and rule out other conditions.
Frequently Asked Questions
Is lichen nitidus dangerous or contagious?
No. Lichen nitidus is a harmless, non-contagious skin condition. It is not cancerous and does not spread from person to person. It is mainly a cosmetic concern and often clears on its own.
What does lichen nitidus look like?
It appears as clusters of tiny, pinhead-sized, shiny, dome-shaped bumps that are flesh-colored or slightly lighter. They commonly occur on the chest, abdomen, arms, backs of the hands, and genitals, and are usually not itchy.
Will lichen nitidus go away on its own?
In most cases it resolves without treatment over several months to a couple of years. Because it is benign, observation is often all that is needed, though treatment can be used for itching or cosmetic reasons.
How is lichen nitidus different from lichen planus?
Despite the similar names, they are separate conditions. Lichen planus tends to cause itchy, flat-topped, purplish bumps and can affect the mouth, while lichen nitidus causes tiny, shiny, flesh-colored bumps and is usually not itchy. A skin exam or biopsy can tell them apart.
Does lichen nitidus need treatment?
Often not, since it is harmless and frequently clears on its own. Topical steroids or antihistamines may be used if there is itching or cosmetic concern, and a dermatologist can suggest other options for widespread or persistent cases.
References
- American Academy of Dermatology (AAD). Lichen nitidus.
- Mayo Clinic. Lichen nitidus.
- MedlinePlus, U.S. National Library of Medicine. Skin conditions.