Classification of skin

- Sep 11, 2018- stains

(1) Performance characteristics:

1) More symmetrical distribution;

2) Black and Tan are mostly;

3) There are four cheeks, cheekbones, forehead and mouth;

4) There are butterfly spots, pregnancy spots, sunburn and chloasma.


(2) Causes:

1) Congenital genetic factors;

2) Physical illness, self dysfunction;

3) Endocrine disorders;

4) Environmental pollution and excessive exposure to ultraviolet radiation;

5) Improper use of makeup and skin care products;

6) Oral contraceptives and diet pills;

7) Psychological factors.