What happened to the white flakes on my face?

The white flakes on the face consider the following several disease possibilities: 1, pityriasis rosea: can appear in the circumference of an oval larger mother spot, with fine scales, after which the rash can gradually spread, spread to the face to form a light red patches, with white flakes on. The cause is not clear and may be related to infection or swimming and other factors. 2, psoriasis: mainly due to genetics, smoking, trauma, immune disorders and other factors are related to the formation of silvery-white scales, which can be seen under the film phenomenon, as well as the phenomenon of punctate bleeding, treatment can be applied tacalcitol ointment The treatment can be done by applying tacalcitol ointment.