*Develops secondarily to many types of disease (''e.g.'' [[Parasitic skin infections - Pathology|ectoparasites]], [[Mycotic skin infections - Pathology|fungal infections]], [[Endocrine effects on the skin - Pathology|endocrine disease]], internal disease or allergy) | *Develops secondarily to many types of disease (''e.g.'' [[Parasitic skin infections - Pathology|ectoparasites]], [[Mycotic skin infections - Pathology|fungal infections]], [[Endocrine effects on the skin - Pathology|endocrine disease]], internal disease or allergy) |