One, diagnose
It is not difficult that this disease is diagnosed. Incidence of a disease of male and female does not have notable difference, to old from firstborn the old person all can come on, 6 ～ come on 25 years old amount to a height. Bit of shape is when be being sent first or piece shape pigment drops spot, or several, because melanin unfinished is taken off completely,break, show weak white, very not as clear as normal skin dividing line, leather damage develops gradually expand, melanin is taken off completely break, as clear as normal skin dividing line, show ivory or porcelain white, size differs, appearance adventitious, can be a circle, elliptic, map form. Number differs, arrive to send blaze more from individual skin damage, all over any place all can come on. Send place by how ordinal the mucous membrane inside week of back of Qia of the neck that it is a face, abdomen, brothers, limb, bosom, external genital organs, anus, lip, glans, wrapping all can be accumulated.
2, differentiate diagnose
1, tinea versicolor: Tinea versicolor is taken off for pigment of fungus be caused by lose spot, show shallow white, happen after more back and upper limbs, show a shape to distributing, dividing line is not clear, blow visible phosphor bits gently to fall off. As inchoate as wind of white purplish or white patches on the skin come on easy promiscuous. Differentiate a point, wind of white purplish or white patches on the skin does not have bits, show with the hand border of pressurization skin damage is clearer, and after tinea versicolor pressurization criterion bounds is more unsharpness.
2, senile sex blaze: This disease happens at middleaged above, common at old people, come for circular grain of rice spot of bean become known, cave a bit, medicinal powder in distributing, not shirt-sleeve, happen at pectoral back, limb more, do not happen in facial, teenage children does not come on.
3, anaemic mole: Main characteristic is after be born, have namely, melanin is taken off break inhomogenous, the edge is not clear, show the weak white splash with very light color piece, much confine is in some place, most patient does not diffuse, leather damage grows as the skin and increase, but clinical and visible the Ke Jifa of anaemic mole patient of about 15% is white wind of purplish or white patches on the skin, grow pure white spot in body other place namely, can continue to develop. So this disease also should be treated.