Skin Disease Type And Its Effects

Skin Disease Type And Its Effects...

Skin disease may arise from agents which attack it from outside or from within. These agents may take the form of damaging radiation (e.g. severe sunburn), irritants (e.g. acids and alkalis), or living organisms (e.g. the virus of warts or the mite of scabies). 

Agents arising from outside the body may nevertheless be spread via the bloodstream, the usual effect being involvement of a wide area of skin in a symmetrical pattern; examples are the rashes of secondary syphilis, measles and those of many drug eruptions.

Genetic and racial factors are important since many skin disorders are inherited. The climate, especially the degree of sun exposure and the humidity may bring on skin lesions or modify existing ones. Systemic disease such as diabetes mellitus or malignant disease can make the skin more liable to infection by bacteria, yeasts and fungi. Psychological upsets undoubtedly influence skin disease but only rarely are they the primary cause.