The endocrine disorder: facial skin oil secretion imbalance, not timely clean skin leading to local pore blockage, skin residue substances can not be discharged or often eat fried food, so that the skin secretions become sticky will be oily. 3, seborrheic dermatitis: seborrheic dermatitis patients are prone to hair oil, itching, and in severe cases, seborrheic alopecia. The facial triangle is prone to oily, dull and flaky complexion.