Skin diseases and allergic reactions 

A congenital disorder characterized by the complete or partial absence of pigment (melanin) in the skin, hair and eyes.

A skin condition characterized by itchy papular eruptions on the extensor area of the upper and lower limbs which is associated with HIV infection

Is a condition presenting with patchy depigmentation of skin

Is a disease caused by deficiency of a variety of specific factors, nicotinic acid being the most important. Cardinal signs: diarrhea, dermatitis (sites exposed to sun and pressure) and dementia.

It is a severe life-threatening disorder with generalized loss of epidermis and mucosa. HIV disease increases the risk of developing TEN.