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Classification of skin
- Sep 11, 2018 -

5.skin 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.