Lichen simplex chronicus (neurodermatitis) is a common skin dermatitis that results from repeated rubbing or scratching of the skin.
The stimulus to scratch may be unrecognized, perhaps a mosquito bite, stress, or simply a nervous habit.
The result is a very itchy patch of skin, often located on the nape of the neck, scalp, shoulder, wrist, ankle, or genitals.
The affected skin is thickened, often appearing as a group of small firm papules (bumps).
The skin markings are more visible, and the hairs are often broken-off.
The color may be darker or sometimes paler than the surrounding skin.
Lichen simplex tends to be very persistent, and readily recurs despite often initially effective treatment.
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