Acne is a recurring condition that may be associated with high sebum secretion and abnormal keratinization of hair follicle openings. 1. Higher sebum secretion: Improper cleansing of the face, hot and humid environment, higher androgen levels during puberty, and overeating of high sugar and oily foods can lead to exuberant oil secretion. Improper cleansing and untimely discharging of sebum will lead to blockage of pores with sebum plugs, resulting in the formation of pimples. 2. Abnormal keratinization of hair follicle openings: related to more sebum secretion and exuberant androgen levels, more sebum secretion and obstruction of discharge can block the pores of hair follicles, stimulate abnormal keratinization of hair follicle openings, which in turn block hair follicles and form acne. If you have recurring pimples and closed mouths, it is recommended that you go to the hospital in time to avoid further development into inflammatory acne.