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Insect Bite
This is called "lichenification."[1]
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Atopic Dermatitis
Lichenification
It is manifested by lichenification, excoriation, and crusting, mainly on the flexural surfaces of the elbow and knee. … All stages are characterized by xerosis, fissures, pruritus, and lichenification. … Like affected children, adults also commonly have lichenification of the flexures and facial dermatitis.[2]
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Erythropoietic Protoporphyria
Lichenification
After repetitive exposure, patients may present with lichenification, hypopigmentation, hyperpigmentation and scarring of the skin. … Although blistering of the skin is rather uncommon, repeated exposure can lead to lichenification, loss of nail lunulae, development of pseudovesicles and other chronic skin … Multiple episodes of acute photosensitivity may lead to chronic changes of sun-exposed skin (lichenification, leathery pseudovesicles, grooving around the lips) and loss of[4]
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Stasis Dermatitis
Eczematization is the thickening of the skin with lichenification. … Eczematous changes (peeling and flaking) and lichenification (hardening of the epidermis) can be treated with skin softening agents. … Lichenification describes crusting and layering of the skin that occurs when the normal exfoliative properties of the skin are disrupted by chronic swelling.[7]
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Acanthosis Nigricans
Lesions can develop into severe areas of hyperpigmentation, with marked lichenification, hair loss, and seborrhea. … In primary acanthosis nigricans, secondary inflammatory lesions (ie, lichenification) most commonly develop as a result of conformational friction. … Wisconsin-Madison Acanthosis Nigricans Overview of Acanthosis Nigricans Acanthosis nigricans is a clinical reaction in dogs characterized by axillary and inguinal hyperpigmentation, lichenification[8]
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Prurigo Nodularis
Chronic and repetitive scratching, picking, or rubbing of the nodules may result in permanent changes to the skin, including nodular lichenification, hyperkeratosis, hyperpigmentation … Patients with this condition resort to repetitive itching and scratching which leads to lichenification and hyperkeratosis.[9]
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Lichen Simplex Chronicus
itching chronic dermatosis with circumscribed lichenified lesions, which are due to rubbing and scratching of the skin previously apparently normal, the so-called primary lichenification … There is no known predisposing skin disorder and underlying cause of the development of the lichenification but it could develop as a secondary process due to a chronic eczematous … This constant process leads to lichenification.[11]
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Contact Dermatitis
In cumulative irritant dermatitis hyperkeratosis, lichenification and fissures predominate, leading to pain and itching, but erythema and vesicles may also be present. … Frequently occurring or persistent episodes of acute contact dermatitis often become chronic, with thickening associated with lichenification, scaling, and fissuring. … Seasonal allergies Asthma Other dermatologic problems Surgery Family history Atopy Psoriasis Other chronic skin conditions Examination Morphology of lesions (erythema, eczema, lichenification[13]
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Tinea Cruris
In addition, scratch dermatitis and lichenification can occur. … In addition, scratch dermatitis and lichenification can occur. … Associated pruritus leads to morbidity resulting from lichenification, secondary bacterial infection, and irritant and allergic contact dermatitis caused by topically applied[15]
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Papular Urticaria
Chronic scratching can lead to lichenification or prurigo nodularis.[18]