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milia (singular milium).

Sebaceous tubercle; whitehead; a small subepidermal keratin cyst, usually multiple, therefore commonly referred to in the plural.

miliaria.

An eruption of minute vesicles and papules due to retention of fluid at the mouths of the sweat follicles.


nummular.

Marked by circular or oval lesions.


papules.

Small, solid elevations on the skin.

photoallergy.

Sensitization of the skin to light.

phototoxicity.

The condition arising from overexposure to ultraviolet light.

pruritis.

Itching.

psoralens.

Furo[3, 2-g]coumarin; a phototoxic chemical derived from fruits of the citrus family (e.g., limes).

psoriasis.

A condition characterized by the eruption of circumscribed, discrete and confluent, reddish, silvery scaled macropapules.


Rhus.

A genus of trees and shrubs (family Anacardiaceae) containing various species that are used for their ornamental foliage; poison ivy, poison oak, and poison sumac belong to this genus.


solar elastosis.

Degenerative change in elastic tissue of the dermis due to repeated or constant exposure to sunlight over a period of years.


urticaria.

Hives; an immediate eruption of itching wheals, which may be due to physical and chemical agents, foods or drugs, foci of infection, or psychic stimuli.

urticaria syndrome.

Consists of the typical urticarial rash with systemic involvement.


vesiculation.

Blistering.

vitiligo.

The appearance on the otherwise normal skin of loss of melanin pigment with white patches of varied sizes, often symmetrically distributed; the skin bordering the affected sites is usually hyperpigmented, and hair in the affected areas is usually white.



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