Psoriasis causes thick patches of skin called plaques that are dry and flaky. Dandruff usually comes and goes and can be caused by oily hair or irritants. Psoriasis is a chronic autoimmune disease and ...

What Is the Auspitz Sign? Auspitz sign is a distinctive mark seen when a skin plaque has been removed. Plaques (also called scales) are common in plaque psoriasis, but people with Darier′s disease and ...