The reason for clogged pores is mainly the following: 1, it may be due to the facial application of excessive cosmetics or skin care products, etc., accumulated in the mouth of the hair follicle, resulting in normal skin sebum and other metabolites can not be effectively discharged in a timely manner, often resulting in clogged pores. 2, due to incomplete facial cleaning, failure to effectively remove the appendages attached to the mouth of the hair follicle in a timely manner, will also lead to the clogging of the mouth of the hair follicle. 3, the body of the androgen secretion, sebum secretion abnormal, increased secretion often leads to sebaceous gland ducts can not be discharged in a normal manner, During puberty, the body’s androgens are secreted in large quantities, and sebum secretion is abnormal. Increased secretion often leads to excessive keratinization or narrowing of the sebaceous ducts at the mouth of the hair follicles, which also leads to sebum not being discharged normally, and is retained at the mouth of the hair follicles to form acne, which further leads to acne. It is recommended not to apply too thick cosmetics, which are not conducive to the metabolism of the skin.