Recurrent red, swollen pimples on the face, known as acne, are associated with increased androgen levels, increased sebum production, and abnormal keratinization of the sebaceous glands. Acne is a chronic, inflammatory disease of the sebaceous glands of the hair follicles, manifested by red pimples and pustules on the surface of the skin. 1. Increased androgen levels: When androgen levels increase in the body, the sebaceous glands will function relatively exuberantly, leading to a large amount of oil secretion, blocking the mouth of the hair follicle and thus triggering acne. 2. Increased sebum secretion: Sometimes due to high body mass, hereditary factors or dietary habits, sebum secretion increases, which can easily cause follicle openings to become clogged, as well as easily harboring bacterial reproduction, leading to the occurrence of acne. 3. Abnormal sebaceous gland keratinization: Abnormal sebaceous gland keratinization will make the opening of the hair follicle narrow and small, resulting in the oil can not be discharged, thus forming a blockage, so that the face of the red and swollen pimples visible to the naked eye. Patients with recurring red and swollen pimples are advised to go to the dermatology department of a regular hospital for treatment. Avoid squeezing the pimples with your hands during the treatment period to avoid infection and further aggravation of the symptoms.