White pityriasis and vitiligo difference

White pityriasis, also known as pityriasis simplex, is a common non-specific dermatitis with furry scales. The etiology of this disease is unknown, and may be related to sun exposure, malnutrition, fungal infection and vitamin deficiency. It is more common in preschool children, and is obvious in winter and spring. Symptoms: rash is good on the face, but also on the trunk and limbs. The rash is a round or oval coin size pale white stain. The surface is dry and the boundary is clear. White furry scales are visible. Vitiligo is a depigmentation caused by the reduction or absence of melanocytes in the skin. The cause is unclear, most believe that it is related to the destruction of melanocytes themselves and autoimmunity. Symptoms: Pigmentation spots, varying in size, shape, variable number, clear edges, some white spots peripheral normal, skin pigment increased, white spots on the hair can also be white or normal, most of the lesions are localized, can occur in any part of the body, more common in the face, neck, back and trunk, can also be distributed along the nerve segment unilateral, a few people skin lesions pan-hair body, in the 20 years old before the incidence of more, vitiligo is a chronic disease, no conscious symptoms.