Cause | Dermatologic disease |
Inflammation | - Atopic dermatitis
- Allergic or irritant contact dermatitis
- Seborrheic dermatitis, especially of the scalp
- Stasis dermatitis
- Psoriasis
- Parapsoriasis
- Pityriasis rubra pilaris
- Lichen planus
- Urticaria, dermographism
- Mastocytosis
- Papular urticaria, urticarial dermatitis
- Drug eruptions (eg, morbilliform)
- Polymorphous light eruption, actinic prurigo, chronic actinic dermatitis
- Bullous diseases (eg, dermatitis herpetiformis, bullous pemphigoid)
- Polymorphic eruption of pregnancy (PEP)
- Eosinophilic folliculitis
- Dermatomyositis
- Prurigo pigmentosa
- Lichen sclerosus
- Graft-versus-host disease
|
Infestation/bites and stings | - Scabies
- Pediculosis
- Arthropod bites
|
Infections | - Bacterial infections (eg, folliculitis)
- Viral infections (eg, varicella)
- Fungal infections (eg, inflammatory tinea)
- Parasitic infections (eg, schistosomal cercarial dermatitis)
|
Neoplastic | - Cutaneous T cell lymphoma (eg, mycosis fungoides, Sézary syndrome)
|
Genetic/nevoid | - Darier disease and Hailey-Hailey disease
- Ichthyoses (eg, Netherton, Sjögren-Larsson, and peeling skin syndromes)
- Pruriginosa subtype of dominant dystrophic epidermolysis bullosa
- Porphyrias (eg, porphyria cutanea tarda and erythropoietic protoporphyria)
- Inflammatory linear verrucous epidermal nevus (ILVEN)
- Large/giant congenital melanocytic nevi, occasionally, especially in bulky lesions with neural differentiation
|
Other | - Xerosis, eczema craquelé
- Primary cutaneous amyloidosis (macular, lichenoid)
- Postburn pruritus
- Scar-associated pruritus
- Fiberglass dermatitis
- Prurigo nodularis
- Scleroderma
- Sicca syndrome
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