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Lichen simplex chronicus (LSC) is thick leathery skin with exaggerated skin markings caused by sudden itching and excessive rubbing and scratching. [1] It generally results in small bumps, patches, scratch marks and scale. [1] It typically affects the neck, scalp, upper eyelids, ears, palms, soles, ankles, wrists, genital areas and bottom. [1]
Although other forms of the disease occur at younger ages, some individuals start having long term symptoms at thirty years of age. This disease also affects adolescents and young adults. This also affects the immune system which therefore results in rashes. The symptoms rarely affect the face or scalp, but occurs at other sites of the body.
Polydactylous longitudinal erythronychia has been most commonly associated with Darier's disease [10] and lichen planus [11] but has also occasionally been associated with acantholytic epidermolysis bullosa, [12] no association, [13] graft-versus-host disease, [14] [15] hemiplegia, [16] and systemic amyloidosis. [11]
Toxicodendron dermatitis lesions are often linear from brushing up against the plant. Causes of the Koebner phenomenon that are secondary to scratching rather than an infective or chemical cause include vitiligo, psoriasis, lichen planus, lichen nitidus, pityriasis rubra pilaris, and keratosis follicularis (Darier disease). [citation needed]
Examples include lichen planus, lichen sclerosus and lichen nitidus. It can also be associated with abrasion or drug use. [2] It has been observed in conjunction with the use of proton pump inhibitors, and might be a sign and/or symptom of lupus such as subacute cutaneous lupus erythematous, according to the case reports and reviews. [3] [4] [5 ...
The clinical examination of the skin is used to diagnose and distinguish between the various forms of pityriasis lichenoides. For pityriasis lichenoides, a skin biopsy followed by a histopathologic examination is a confirmatory procedure.
Prurigo nodularis (PN), also known as nodular prurigo, is a skin disorder characterized by pruritic (), nodular lesions, which commonly appear on the trunk, arms and legs. [1]
Pityriasis lichenoides et varioliformis acuta is a disease of the immune system.It is the more severe version of pityriasis lichenoides chronica.The disease is characterized by rashes and small lesions on the skin.