Lichen simplex chronicus
Lichen simplex chronicus | |
---|---|
Other names | Neurodermatitis scratch marks, scale[1] |
Usual onset | Gradual[1] |
Causes | Excessive rubbing and scratching[1] |
Lichen simplex chronicus (LSC) is
Signs and symptoms
People burdened with LSC report pruritus, followed by uncontrollable scratching of the same body region, excessively.[2] Most common sites of LSC are the sides of the neck, the scalp, ankles, vulva, pubis, scrotum, and extensor sides of the forearms.[3] However, due to the stigma associated with chronic scratching, some patients will not admit to chronic rubbing or abrasion. The skin may become thickened and hyperpigmented (lichenified) as a direct result of chronic excoriation.[3] Typically this period of increased scratching is associated with stressors.
Causes
This is a skin disorder characterized by a self-perpetuating scratch-itch cycle:[4]
- It may begin with something that rubs, irritates, or scratches the skin, such as clothing.
- This causes the person to rub or scratch the affected area. Constant scratching causes the skin to thicken.
- The thickened skin itches, causing more scratching, causing more thickening.
- Affected area may spread rapidly through the rest of the body.
Many hypothesize LSC has a psychosomatic origin.
Diagnosis
LSC is typically diagnosed by careful observation and history taking.[3] It is easily recognized (see signs and symptoms, and gallery).[2] Biopsies are sometimes necessary to confirm the diagnosis and differentiate it from other similar appearing lesions.
Treatment
Treatment is aimed at reducing itching and minimizing existing lesions because rubbing and scratching exacerbate LSC. The itching and inflammation may be treated with a lotion or
Gallery
See also
- List of cutaneous conditions