(1) Performance characteristics:
1) Dark complexion, oily and shiny, unclean;
2) Large pores;
3) Prone to black head, acne, acne and acne;
4) It is not easy to wrinkle and is not sensitive to external stimuli.
(2) Reasons for formation:
1) Excessive sebum secretion.
2) Hormone imbalance;
3) The skin has poor hydraulic power and serious water shortage;
4) Food is too dry and greasy;
5) Climate with high humidity and high humidity.