The Photosensitivity Diseases

The Photosensitivity Diseases

The Photosensitivity Diseases

It is important to about the photosensitivity diseases (what are the photosensitivity diseases, how they are caused etc.). It is important to know what are the photosensitivity diseases. The photosensitivity diseases can be classified as genetic, metabolic, phototoxic, photoallergic, neoplastic & degenerative, idiopathic (cause unknown) and diseases aggravated by exposure to sun (photoaggravated) etc.

Genetic photosensitivity diseases: The photosensitive diseases due to genetic cause are phenylketonuria, albinism, familial porphyria cutanea tarda, erythropoietic porphyria, erythropoietic protoporphyria, variegate porphyria, xeroderma pigmentosum, Bloom syndrome, Kindler syndrome etc.

Metabolic photosensitivity diseases: The metabolic photosensitivity diseases are sporadic porphyria cutanea tarda, kwashiorkor, pellagra, hartnup disease, carcinoid syndrome etc.

Phototoxic photosensitivity diseases: They are internal phototoxic diseases due to drugs and external phototoxic diseases due to drugs, food and plants.

Photoallergic photosensitivity diseases: They are divided into immediate and delayed photoallergic diseases. Solar urticaria is immediate photoallergic disease. Delayed photoallergic diseases are chronic actinic dermatitis, drug photoallergy etc.

Idiopathic photosensitivity diseases: They are polymorphous light eruption and actinic prurigo etc.

Neoplastic & degenerative photosensitivity diseases: Photoaging, actinic keratosis, melanoma and nonmelanoma skin cancer fall under degenerative and neoplastic photosensitivity diseases.

Photoaggravated diseases: The diseases that are aggravated by exposure to sun (photoaggravated) are systemic lupus erythematosus (SLE), discoid lupus erythematosus (DLE), subacute cutaneous lupus erythematosus, herpes simplex, acne vulgaris (aestivale), lichen planus actinicus, dermatomyositis etc.

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